Is it better to be hooked to short power in storage? or not?

don,t think it maters to the rv but you must maint your batteries or they will die a short life.

I have kept my RV's plugged in 24/7/365 for 20 plus years with no ill efects

Don’t use a storage facility as I built a nice carport for it and our two cars. It stays plugged in when not in use. I keep the fridge on, AC on to control humidity and of course to keep batteries charged.

I disconnect and shut everything down between trips, unless it will only be a week or two before the next trip. I disconnect the battery when not using the TT. I usually reconnect shore power about 3 days before a trip, and that is enough to get the battery charged up and the frig cooled down and filled up.

I know people who leave everything hooked up all the time, and it works fine for them.

I think it is whatever you want to do.

Summer storage? Keeping it charged and ready for trips? Using it more than once or twice a year? Plug it in.

Winter storage? Using the camper only once or twice a year? Take the battery home and put it somewhere cool and dry, on a maintainer. Don't pay the storage facilities' inflated power charge.

I like mine connected, while in storage, mainly to keep batteries up; though I have managed a couple months of non-use by disconnecting batteries.

It depends.

My 5er alway plugged into 20 amp power any time in covered storage to keep battery charged. And to have power if I needed to do any kind of work or cleaning.