> If I want to go meet a friend for a drink or food, I have to lug around a backpack, keep an eye on it to make sure it's not stolen. If I wanted to have a beer or wine, I can't because I may need to work at any point.

If this is a stated requirement from your employer, talk to a lawyer. This is a common litmus test for whether you need to be paid while on call, even if you aren't actively working. Depending on the jurisdiction you may be entitled to pay (or trigger a relaxation of your company's policies).