Sleeper Rental Questions

I’m heading up to Red next week for a couple of days and am wondering how to keep my flasher battery charged. Last time I was there I only stayed one night and never ran out of power. I know the sleeper shack I’m renting has electrical but not sure if there is too much draw on the generator by plugging a flasher in? Our generator overloaded very easily last time so just wondering. Thanks

you should be fine plugging in