Congrats! I have a 2022 Beyond RB. We were sold on the open feeling of the RB layout. Regarding storage, it depends on the use we have in mind.
Class B as travel vehicle: Right now we are renting a house for a few weeks in Florida. The Beyond is by far our favorite long-distance traveler for this. We can pull off at a rest area, make a nice lunch and a cup of coffee for the road. We can bring enough food for the travel days and for the first couple days at the rental. When used for this purpose, we put a Yoga mat on one of the seats to prevent slippage, and carry a lot of things on the one sofa. (We keep the other open in case one of us wants a break from the front seats). We also put heavy things on the floor for the trip.
We took the shelves out of the rear closet and use hangers. Just putting clothes in at an angle allows a lot of hanging storage.
Class B as camper: Here we need to be more careful on what we take. We might have a few things on the seat while we drive, but we move them to the front floor and front seat once we set up camp. Just a little thing, but that gap between the rear doors and the bathroom floor is just the right size for leveling blocks.
Here is a link to a bike rack I really like. The capacity would handle some but not all E bikes. It has a built-in swing away feature that allows access to the back doors. By the way, this rack does not work with fenders.
LINK