Appreciate the insights, especially the checkvalve idea which I'll probably go ahead do as well. My SHO is definitely not my daily driver, she's my baby which means she'll often be parked for weeks depending on weather (never even been in rain) so your check valve idea is great for keeping my garage free of noxious odors.
Where do you find the best selection of different hose adapters/fittings? I generally have to look at Lowe's, HD, Ace, etc. They only have white for the few nylon fittings they actually carry and brass, neither of which matches all the hardware I used installing the kit.