Given that GD has now killed off the 2910BH it’s obvious who the winner is. That being said the kitchen in the 2800 is a lot better and no need to walk through a possibly occupied bathroom ever. As for towing as a 2800 owner using a ProPride yes it can be done. But it’s not the best experience. Both trailers really should be towed by a HD truck.
Not currently however you can add them aftermarket by attaching to the frame (not the bumper). However the new 2024 models are supposed to be including the hitch now.