I vote revolver as I have yet to find the 22 semi that will digest anything and everything the way a revolver will.
I have a many year supply of random 22 from shows, yard sales etc. I don't like having to buy specific ammo for a 22, that is the beauty of them, cheap, easy to find ammo. Yes I have 22 semiauto pistols, they are a training tool, they get fed the ammo they like when needed then go back on the shelf till needed again. I have 4 22 revolvers and one is always with me along with whatever ammo I am burning up that week.
For camping / hiking / bumming around my assumption would always be reliability in a variety of ammo will trump all other concerns so I would always go revolver. I like the bearcat for a small portable plinker.