All I know is that you don't want to NAIL them to the roof... Sorry I couldn't resist...
The good news is that there are many members that have done this successfully. How many panels are you planning? Are they just for recharging? If you plan on boondocking then capacity becomes important. Have you identified the controller, inverter (if any), wiring or other features for your system? Is that alligator in the avatar your pet?
You have a beautiful rig combination (your pet alligator matches the color scheme). I hope you post what you finally end up doing.