I strongly recommend onto the vehicle as you can use it when you're not camping and if you have to drive to the boat launch. Generally with a pop-up, clearance isn't an issue if you have longer boats.
As well, you just never know how the roof is going to take the extra holes and weight.
But- if you do go that route, Thule makes mounts that permanently attach to vehicles that you screw/bolt into place and then there are risers that click in and out of place. Their stuff is expensive, but top notch.
__________________
Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're part-timing on long trips
|