I have an assortment of rifles and shotguns (both sidelock & inline) and a pistol and revolver for days when I'm too lazy to carry a long gun.

Probably the most used are my T/C NewEnglanders (.50 rifle & 12ga shotgun).
I shoot ball, conical, orsabots, (and of course shot in the shotguns).
Powders on hand at the moment include Goex (ffg, fffg, & ffffg (in case I find a good flintlock that follows me home)), APP-JSG, triple se7en, and Pyrodex. I keep an assortment of #10, 11, & musket caps on hand with some 209 primers to ignite the powder (plus a handfull of flints in case a good flintlock follows me home).
Unfortunately I don't own a good .62 smoothbore fowler or a good underhammer at the moment, so I'm still shopping to fill those voids.