All cats claw. Some cats pee.
Clawing: Most cats can be trained to scratch a post. Put some catnip on it and reward scratching with treats. If you can't train him to not scratch your upholstery, some cats will let you trim their claws, which you have to do every few weeks. Don't cut too short (down to the quick) because it's very painful and it will bleed.
Peeing: If it's habitual, it's almost impossible to break. Some cats only pee indoors if their litter box gets too funky. Either way, it's really hard to get rid of the smell, and in a small RV you're stuck sleeping next to it. If it happens more than once or twice, I'd find a new home for the cat where he can live outdoors.