you call yourself a senior at the 71? you're just hitting your stride !!
This is what I do:
Empty black/grey/fresh water tanks
Open all the faucets and open the low point drains
Open the hot water pressure relief valve (which will allow the hot water heater to drain)
Clean the motor home inside and out - don't leave food for the mice to enjoy
Remove batteries and store them indoors on a trickle charger.
Switch off propane
Check tire pressure
I also clean the underside of my TT with water to get all the grime/dirt off the chassis and the springs/brakes. I then spray a mixture of MMM/WD40 all over the exposed chassis (You have a motorhome so probably skip this step)
I also take care of any maintenance; like painting any areas that show surface rust.
It usually takes me a whole day but the TT still looks like new - so it's worth it to me.
Gerry