Most Tiffin's have a driver's side door on their smaller class A's.
As far as traveling with two dogs, that will depend only on your honest assessment if they are barkers when absent, or suffer any separation anxiety that would cause them to disturb other campers, or worse yet trash your rig while gone. Most campgrounds are pretty tolerant of pets, and dogs, but again the onus is on you whether or not there'll be any kind of issue with them. That's the problem with many pet (dog) owners.
As I was walking with my dog one time off leash we came upon another hiker and I called out "he won't bother you!", his almost profound response was "Yeah, that's what All you dog owners say before they bite you!" (mine didn't). He was right though, it's the dog owners.