What RV do you have??? Always post leading with that so we can help better. Assume after seeing response to Ace that you have a 22' long rig.
Anyways on my Class B Tellaro 20L:
1) re-install bike rack with sikaflex 252. Thor didn't use adhesive... remove bike trays, added box for outside connection stuff. Mine was all scratched up underneath. Evidently Thor tells workers to ignore manuals.
No straps used- box mounted with SS hardware and locknuts.
I also removed my sewer tube carrier from side and added a Valterra tube to the bike rack below my utility box. Can use super duty zip ties or bolt with metal straps. Added mixing water valve where tube was on driver's side.
2) Spare wheel from eBay, tire from tire store, and Landed Gear Spare carrier w/ plate holder. I also carry a 12V jack/compressor inside under my wardrobe. Also lug wrench and spare belts for engine, all in a nice utility bag. There are also swing-away hitch-mount spare carriers.
link:
Amazon.com
3) CargoMax2 box and swingaway carrier on hitch w/ tail lights. Holds our chairs and tables- had to mount 3" off center (new holes in bottom to clear the box, when swung out and opened- plugged original holes)
(folding 20" bike will fit inside too!)
Note Van Windows Direct venting window w/ screen on LR door.
Also added 'kickstand' when box is swung out to carry weight.
link:
Amazon.com
Also added 2nd solar panel, and many more mods- PM me for more info if you like... 'only' 80 + mods so far. Went all the way to Utah from Vermont with this setup w/o problems.