If your bikes have quick releases on the front wheels, mounting fork mounts to the under side of the dinette seats is the way to go. Move cushions, flip seat over, instant bike rack that is completely out of the way when you don't need it. Bikes stay dry and safe inside the RV.
I can fit 4 bikes easily between the two opposing dinette seats. Just have the bikes with you when you mount the mounts so you can get the spacing right. You can have the fork mounts angled a bit if you need more handlebar space.
2012 Ford F-150 3.7L V6 -- SOLD
2007 Rockwood 1640 LTD Popup -- SOLD
2004 Bantam 19 HTT -- SOLD
2015 RAM 1500 5.7L V8
2015 Coachmen Freedom Express 292BHDS