Shane Shane shane, Never never nerver get rid of a good book. I would suggest these two books, the first one however is out of print.
Uniforms and Equipment of the United States forces in the War of 1812
By Rene Chartrand
Great book. There is lots of information on regulars and the militia. The sections on uniforms, equipment, and weapons are first rate. If you get the chance to pick up a copy get it.
Osprey Men-At-Arms #345
The United states Army 1812-1815
By James L. Kochan
Great text and plates. The company of Military Historians have a great site. They have a listing of the more than 800 uniform plates they've produced, many still available. They also have a quarterly journal and forum on their website. I'll poke around some books for some militia info.~Gary