Wecome to the forum, Camper.
Keep in mind that locks only keep honest people, honest. You can have the best lock in the world, but if a crook wants your stuff, he'll get it.
As far as hardening up your camper, to make it less attractive to the crooks, I would go with a good tongue lock and a wheel lock. I've always had good service out of Master Lock products.
When I was a kid I was going nowhere fast, now I'm an old man I'm going everywhere slow.