You do. Antennas are easy, solar is less so, so the panels should probably have the priority. I've put antennas on everything from bicycles to humvees to dump trucks, it's a very straightforward mechanical exercise. My take on it would be to have a basic antenna on the roof and plumbed into the system, with an option for a separate better performing antenna for when needs dictate. The option is something that stows and you can deploy, no modification or installation required. You may find you never need it, or always need it and you can regroup from there. Maybe you can take what's there and come up with a different deployment scheme, maybe something that clamps to the ladder or slide flange/awning hardware. This isn't an always/never decision, it comes down to a performance threshold - the small antenna will work, the larger antenna will work "better". There's nothing special about the stock location or installation, other than it's already there. You're making a design choice that solar is probably more important and given the complexity of an antenna install vs a panel, I'd replace/relocate the antenna every time. Other than height the antenna doesn't care where it is, but panel location choice is more limited.
Mark B.
Albuquerque, NM