Yeah. Even in a garage, heat will be you cars biggest enemy. If your garage door is south facing, it will be nothing for the temps to reach 95+ on a sunny day. And I mean PLUS!
So seals will get hard.
From your planned pattern of usage, gasoline won't really be an issue, a little stabil should do the trick. You are also going to be near the water, so expect some weird places to corrode from the salty mist. Check battery terminals and stuff regularly.
Don't keep any windows open, Anoles will get into places you can't imagine. Harmless, but who needs dead ones in their car?
My neighbor keeps one here all year long, drives maybe twice or 3 times a year, no issues at all. Battery tender should only be a maintainer, and he puts his on a weekly timer, not every day due to the heat.