You'd be surprised what you can fit into a 5th wheel, if you want to. I have klf 20s, tangent 500s, 15"sub and a bunch of surrounds in an RV.
Like other say, you can have them do double duty as a table. Or in my case shelves....
Driving is a concern, but you are parking on land. This is my plan also. I'm only moving one more time.
I'd keep them. But then again, I keep ALL of them!!