Hi,
As many others have suggested, if at all possible go for roof mounted panels.
Some advantages of roof mounted panels are:
- Charge while on the road, stopped for lunch, or parked at home
- Security of the panels
- Mount and (almost) forget it
- No need to find storage space for portable panels
- Not constantly fussing with them to track the sun
- Possibly shorter distances involved which lower wiring costs
If your wife is concerned about water intrusion (a valid concern), find a reputable installer and have then do the work.
Portable panels can produce more power if properly positioned and adjusted throughout the day. But, is this what you really want to spend your day doing?
Whatever you come up with though, you will enjoy solar.
Steve