Depending on what you want to get for an RV, you might also want to check where the outlet pipe(s) is located. Our main black/grey is under the end of the slide and hard to reach without getting on my knees. Handles aren't easy to reach either. Planning to relocate them one of these days.
We have a 2nd outlet for the galley grey tank. I always just lay the hose directly on the ground and walk it over to the galley outlet after dumping the black/grey. Not heavy at all or difficult in any way other than having to get under the slide to disconnect the hose.
Note that attaching/disconnecting the bayonet fittings can be difficult. You can get a pair of wrenches for some brands/types of sewer hoses tho.
Getting old just plain sux. Ask me how I know... :(