Authentic reproductions are easily available from mail order companies or directly from sutlers. Linen suspenders with leather ends. Depending on your trouser style you may need single or double loops. This may seem like a trivial item, but the more authentic versions are worth the investment. Our troops like to wear Slouch Hats or the standard issue Confederate forage cap.
Straw hats are acceptable if ok'ed by an officer.
Kepis are not popular. Hat Stars only, no numbers or letters should be on your headgear. Another option is to wear contact lenses, which are acceptable in our unit. The knapsack has never been required in our unit due to the cost, but most members eventually have gotten one because they provide a convenient and authentic way to pack your gear for the trip. His double-bag Federal Issue is classy.