We have had two Bigfoots and have had the steps hanging off the back for probably 150k miles,and probably 50k of that in Mexico, rougher roads(not washboard gravel)with unmarked topes, etc. Average fast speed down here is probably 50-55mph much higher than the 30-35 I'd expect on the non Pan America highway roads in SA. Our current model the 30C1002 probably has the same bottom shell as your 10.6 with the steps hanging from the molded fiberglass bumper/ledge. We use a raft strap similar to the one pictured above and have put a piece of split pipe insulation taped to the bottom rung as othewise it bounces on the basement door. We also use locking jam nuts on the step brackets.
