Yes, most discharges of a firearm inside of a vehicle will likely damage your hearing. The importance of carrying a first aid kit with you, specifically one that will deal with trauma that would be caused by a firearm, is invaluable. Go prepared. Just my two cents.
I've eaten far more MREs than I can recall. Many months' worth of them at least. All I can say is that they do serve a purpose and some of the newer varieties are actually decent by all accounts. That said, while I do have some fresh MREs stockpiled (remember to rotate them out on a regular...
Best hog’s head cheese I’ve ever had was from T-Jim’s Grocery in Cottonport Louisiana. If for any reason you’re in the area you must stop in. It’s small and of questionable virtue by sight alone but the quality is there.