There are at least three manufacturers of RV door locks; Fasted (FIC), Trimark and Bauer and now the cheap Chinese clones are arriving and they are junk. They all do their locks differently and have changed how they key them through the years.
Its usually possible to add a residential deadbolt to the entrance and you can have it repinned to match your house door, so one less key to carry.
You can buy new plugs for your storage compartments online at websites like rvlocksandmore.com, etc.
They are very easy to pick no matter which pinning you have and they can easily pried open. I actually leave mine unlocked in campgrounds. The damage to the doors would be a bigger pain than replacing a few chairs or a campstove.