Hi Kon21
Welcome to the forum. You should be fine if you are only using it the night before. Your house batteries should not drain down for that short of a period. You do have to leave your use switch on during that time period. I usually bring my motor home to the house from storage the day before and run an extension cord from my garage with a dog bone adapter for a 110 to 30 amp adapter to run the refrigerator before a trip to cool it down. I have never had a problem with the batteries running down the few times I could not hook up to my house and had to park it across the street in the school parking lot for a few days at a time. Remember to have the use switch turned on whenever you are driving it.
Paul
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