I don't think that leaks would be a problem-it just rains more often, not harder. You won't use it as much is the only downside. BUT you can take trips of 100 miles and be in an inland desert! Just over the mountains to the east and south is some fine driving areas. And don't forget those drives down the coast, SPECTACULAR! Keep it.

Mildew and other issues are just another maintenance thing. RaggTopp Protectant twice a year should stop any problems.
Good luck on your move!