Just my thoughts...not much space between cab and overhang of a FWC....if you do not allow sufficient clearance between the cab and FWC they may make contact; there is movement between the two off road or when you hit bump...ouch indeed...if you raise the camper [or increase the load on the 'roof'] then the CG goes up as does the wind resistance.. hey, no free lunches.
Very satisfied with the collapsible ladder [Amazon]....stores into a small place and is very sturdy
IF you remember to assure that all segments are locked into place! I got a cheap lesson...