With a long road trip on the horizon for our family, we are considering
adding a cargo box on top of our pop-top (Thule model "Ascent 1600"??) or
a rear-mounted hitch version (Thule model "Transporter - Combi"??), for
our 1991 Mulivan camper.  Does anyone have experience with either
scenario, and thoughts on the pros vs. cons of each?  Our concern with
mounting on the pop-top is the possible inability to raise the pop-top
with the cargo box containing belongings, as well as possible wear on the
pop-top hinges.  Any feedback you have would be appreciated.  Thanks!

Sean & "Winnie"
Seattle, WA