Welcome to the forum its a great place to get your questions answered. There should be no time limit on how long you can leave a unit open. With that said I would defer to the A frame group on the forum for their experience.
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Retired Navy
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho
I would just make sure that you make sure the camper is good and level if leaving it open for extended time. Also keep an eye out for critters trying to jump into such a great place to hang out.
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2019 Rockwood A213HW
2015 Toyota Highlander Limited
We regularly pass a Chalet Aframe that has been open for years in someone’s yard. Being all hard side, there really isn’t anything wrong with leaving it open (tent trailers, on the other hand, have canvas that you don’t want to expose to the elements longer than necessary to preserve it). Just check it occasionally especially after rain.
I leave ours set up in the driveway between trips.
I keep it plugged in to keep the frig cold. Kinda handy to be able to grab a cold beverage when out in the front yard. Use the radio too!
I open the windows on nice days to let it air out.
The FW tank and WH are drained between trips.
We regularly pass a Chalet Aframe that has been open for years in someone’s yard. Being all hard side, there really isn’t anything wrong with leaving it open (tent trailers, on the other hand, have canvas that you don’t want to expose to the elements longer than necessary to preserve it). Just check it occasionally especially after rain.
We leave our up. We live on the prairie and have high wind conditions. We prefer to put it down if the with appears to become severe. Consider this as a common sense decision. Why chance it?