Fill the gas tank to prevent condensation. Also, some sta-bil in the tank to keep the gas from turning to crap.
Whe you start it up, make sure it gets driven long enough to warm up the tranny and boil out any water that may have condensed.
I asume you are using a synthetic oil, if you are, no worries on the engine.
Sucks about the seizure, hope it was only a one time thing, it would suck to not be able to drive again.