Greetings Dave,
Two places I have found on my own are Owl Hardwoods in Des Plaines, IL
http://www.owlhardwood.com/ (2 miles north of O'Hare), and Plywood Door USA
http://www.pdusa.com/ in La Grange, IL, (13 miles south of O'Hare).
Owl Hardwoods carries a wonderful assortment of Domestic hardwoods, (Alder, Aromatic Cedar, Ash, Basswood, Beech, Birch, Butternut, Cherry, Cypress Cypress, Hard Maple, Birdseye Maple, Figured Maple, Quilted Hard Maple, Hickory, Poplar, Red Oak, Big Leaf Soft Maple, Figured Soft Maple, Walnut, White Oak) ... and Imported hardwoods, (Anegre, Bloodwood, Bocote, Bubinga, Cocobolo, Ebony Gaboon, Ebony Macassar, Ebony Mun, Jatoba, Jelutong, Lacewood, Leopardwood, Lignum Vitae, Lyptus, Mahogany African, Mahogany Genuine, Makore, Figured Makore, Padauk, Panga, Pao Rosa, Rosewood Honduras, Rosewood Santos, Sapele, Spanish Cedar, Teak, Tulipwood, Wenge, Zebra Wood)Â Many of the above are also available as plywoods. Unfortunately, the only marine grade plywood they carry is fir, sided A/B. All of the woods are kept inside, and I like the Des Plaines location the best as they have the longest lengths and greatest varieties. If you go, plan on spending two hours just drooling over the cedars and mahoganies.
Although not on the official list above, nor does it appear on their web site, they usually have about a thousand board feet of sitka spruce in 8 to 13 ft lengths. If you call often enough, (or stop by on your way home from work like I do) you will eventually find that they have acquired a few 15 or 16 foot long boards suitable for making spars. SCORE!
A view from inside Owl Hardwoods ...
The place is laid out like a library, with similar species of wood grouped together. Smells wonderful.
There is a shop in the back, and they can cut stock to your specifications, and of course that will cost you a few pennies.
So this is definitely the place to go to find all of the fancy trim pieces for your Vacationer build. Be sure to have a list of all of the dimensions that you are looking for ahead of time. The Mahoganies are not cheap and come in all kinds of sizes and lengths, but if you pick through the piles carefully, you should be able to find a set of boards that will allow you cut your trim pieces from with an absolute minimum of waste. But you will have to be creative in laying out the parts. Again, none of this is cheap wood, but I have not seen a finer collection anywhere.
I got my Okume plywood from Plywood Door USA, a plywood importer / wholesaler who normally deals only with businesses ordering by the pallet. But some of the office staff own boats, and if you tell them the Okume is to build a sailboat, they will deal with you individually. Their offices were located in a dome-shaped building in La Grange, and the plywood was stored in a general access warehouse a few miles away underneath the bridge where La Grange road crosses the cal sag channel. It was a little disconcerting to go pay for the plywood at the office site unseen and then go over to the warehouse with a will-call slip. However, once there, one of the forklift drivers drove out to my car with three pallets of plywood (6mm, 9mm, and 12mm) and let me pick the ones I wanted. All of the sheets were perfect (A/A, no knots, no plugs), so I picked the sheets right off the top. Okume is not cheap, but it is oh so pretty; plus the sheet sizes are metric, so they are a little larger than the standard USA size of 4x8, which gives you an extra inch or two per sheet for laying out parts. Because of this, I didn't have to make the little triangles to fill in the side panels at the transom, because the long sheets covered the entire hull.
I just checked on their web site, and it looks like they have moved their offices a few more miles south to Palos Hills. Either the rent was cheaper, or they got tired of working in a building with no square walls.
Finally, there is (84) Lumber (
http://84lumber.com/). Their are fewer of them today then there used to be, and I have not visited one in some time, but you used to be able to pick through the southern yellow pine stacks and find very good straight grained quarter sawn boards in ridiculous widths, just like Paul said previously. They used to have a store in Naperville with the lumber inside, but I see that store is gone now.
The Glen-L web page
http://www.glen-l.com/resources/lumber-suppliers.html also lists ...
Wisconsin
  Caledonia - Kettle Moraine Hardwoods, 195 S 27th, 414/835 9212 - L (4-00)
  Green Lake - Norton Boat Works, 535 Commercial Av, 54941 414/294 6813 - L, PW
  Hartford - Kettle Moraine Hardwoods, 5261 Aurora Rd, 53027, 414/644 8119 - L (native & mahog.)(4-00)
  Madison - McCormick Lumber, 3156 Milwaukee St, 53714 608/244 4741 - L, PW
  Plum City - Grange Hall Hardwoods, Inc., W2326 US Hwy 10, 54761, 715-647-4544 - L
Illinois
 *
Arlington Heights - Owl Hardwood Lumber, 1514 E Algonquin Rd, 60005, 312/439 5580 - L
 * Des Plaines, - Owl Hardwood Lumber, 926 S. Graceland, Des Plaines, 60016, 847.824.5025 - L PW(Marine fir)
  Carterville - Chamberlain Marine, 115 Olive St, 62918, 618/985 6119 - L
  Chicago - Charles Horn Lumber, 2440 S Damen Ave, 60608 312/847 7397 - L (Sitka sp)
  Chicago - Wood World Chicago, 2460 W. George St., 60618 773/267 3800 - L, PW (Marine Grade Douglas Fir, Meranti, Okoume)
  Countryside - Plywood & Door, 6335 W Joliet Rd, 60525, 708/354 2155 - PW (Okoume)
  Glenview - Wood World, 1719 Chestnut Ave, 60025 708/729 9663 - PW, L
  Highland - Wicks Aircraft Supply (in the St. Louis metro area). - Mar PW, L (Sitka sp)
  Paris - TA Foley Lumber Co, 1800 S Jefferson, 61944, 217/462 6180 - L
  Sycamore - Hardwood Connection, 1810 W. State Street, 60178, 815-895-8733 - L
* I corrected the entry for Owl Hardwoods.
Cheers,
Tom