Any ideas on how I can get the rats out, first?
Rats can't be caught in glue or those snap traps. And in my experience they can consume a lot of mouse poison and not die.
The ONLY way to get rid of them is to Get a hav-a-heart/generic brand rat trap. Tractor supply has a sale on them. You get a big trap AND the small rat trap for just the price of the small one. {make sure to always buy a 2 door one}
http://www.havahart.com/store/animal-traps/ratsPlace some raw fish in it and you will have them in less than one night.
Then you can just put the trap into water and drown them. Or if you feel you can't kill them take the trap and rat for a relocation ride FAR away from your home. Keep setting the trap until you get them all.
BTW: this is also the best way to get rid of squirrels/raccons that can cause damage to your RV also.
Hope the info helps.