You're ok with simply removing the cap and casing it up. Set it at half-cock if you feel better or do the leather thing. I don't void a load by shooting until I am done shooting....as in the end of the season. You'll need to fully clean any black powder gun after shooting it at the ground, in the air or a deer within a day or so. On a two day hunt, I'd just reload if a shot a deer the first day and keep right on hunting but un-capping and leaving the gun in the truck between hunting days. Then give the gun a good cleaning the second night. If you don't shoot at a second deer and you don't want to mess with blowing the charge out with air just point the muzzle skyward or directly at the ground and fire the charge....assuming you are not with others. Step away from others to do this if you're in company.