Been hauling dirt bikes for a long time on a variety of vehicles. On my 80's MH, I had a custom rack. Basically two arms welded directly to the frame rails and a channel for the bike welded across. There was a bumper hitch but I didn't trust it.
With my 24' '06, and a 100cc trail bike, I have three options:
1. A rack in a type III hitch. Plus- this is the quickest and most convenient. No backing/ manuvering problems. Negative- not the most secure against theft. Bike gets sun beat and dirty on a long trip. Does affect handling, on mine, the bike blocks the lic plate. Tail lights OK.
2. Small enclosed trailer (5 x 8). Plus- can carry 2 maybe three bikes and a lot of camping junk. Relatively secure. Tows very easy. No noticable affect on handling (until you back-up). Big plus, bikes are stored in trailer when home.
Negative- little short trailer is a pain to back-up with a long motorhome (but doable). Highway speed restricted, 55mph. Do get with a normal car size wheels.
3. Put the rack on the back of your toad. Plus - you have a car and a bike.
Negatives- see #1. I got a smaller beater bike just for this option.
Norms 2 cents