How Long are you going to stay? Will you be going back again any time soon. If so, check the breaker box and see if there is room for a 30 amp breaker. If so, pigtail a 30 amp breaker outside the box on the wall of the garage. Not too expensive. Home Depot or Lowes has the stuff. Assuming the control panel is in the garage Easy to do. I have done it three times at my kids houses. That is if you have any electrical knowledge or know of someone who can help. Just a thought. Otherwise all the suggestions before certainly apply. Happy travels. Arnold