Brian,
I've stored my car for 4 winters at this point. All I do is the following
1) Inflate tires to 45psi
2) Put dryer sheets in cabin to keep it smelling "nice"
3) Battery Tender
Thats it. Every spring, it fires up no problem. Don't over think it
Also, I never start it over the time its stored (usually 4-5 months). I don't think its necessary to start the car once per week, and let it idle for 15min to warm up, just to shut it off again.
Thats what I've done for the last two years. Can't run a battery tender since there's no outlets. I'll just take it out. I've read about these Flat Stoppers but the price is ridiculous. Just curious if anyone has had negative effects without them. Sounds like I'm good the way it is. Thanks guys.