In my previous class C I had seat belts put in on the rear facing dinette. Most dealerships will not mess with seat belts at all, liability reasons. I did it so that my son who was in a rear facing seat, could sit across from my niece. It was a great set up, but in TX kids can only sit in rear facing seats until they are 35 lbs or 2 years old.
If you fold the table down, you can put a rear facing and forward facing seat on both sides. The kids can still see each other.