camperpug,
Welcome to the Forums! :)
Is your RV 30A or 50A?
Is/was your hot tub circuit 240V/50A?
If your rig is 50A and the hot tub is 50A, then it's pretty straight forward. In fact, the plug of the motorhome might fit into the receptacle of the hot tub.
If your rig is 30A, then you'll use just one of the hots on the 240 V service, the neutral and the ground. You should change the breakers accordingly back in the panel.
It's not rocket science. If you've done wiring before, you should be able to do this. If what I said above doesn't make any sense, then perhaps you should hire someone who has experience with RV wiring.
Just remember: 50A RV's are 120V/240VAC (just like a standard electric range outlet), 30A RV's are 120VAC only!!!
Good Luck,
~Rick
