Kama, we use a "ladder mounted" rack we purchased at a local RV store; the rack slips onto one fo the steps on the ladder, and has two "saddles" the bikes lay in, and then uses strapping material to hold them to the ladder. One very recent caution; we had the bikes strapped on, and the winds were strong enough to pull one of the ladder mounts out of the TT and bend the ladder..but the rack held the bikes o n jsut fine. Now I have to straighten the ladder..Oh Well.
Enjoy the ride, wear a helmet!
Bob and Kathleen Hartman
2004 Dodge Cummins Diesel H.O., Dually, 4-dr. long box, 6WD.