Storing the TM for the summer in Florida

Hello All,

The Florida summer's heat and high humidity have just socked in and will be here for 4.5 months. I would like to put my TM "to bed" until more reasonable weather returns. Especially since the air-conditioner feels like having a train in my brain. I keep it under a tall 30' long carport, so it's in the shade for what that's worth.
But what should I do to prepare it to withstand the constant 95 degree weather and near 100% humidity?
I emptied the fridge, wiped it down with bleach and propped the door open. I will empty and thoroughly rinse the Thetford Stinker. But, windows open or closed? Shells open or closed? Leave the fan on low all the time? Try to dehumidify? Anything electrical that I should disconnect? Disconnect the battery? Also, I may take off for Alaska and not come back until 10/1, so I won't be able to make any changes during that time.

Thank you for your thoughts!
Trudy