Storage top up or down?

[menoco]

Surprised that search didn't reveal any discussions on how best to store camper. I'm off for a month and leaving truck-camper at home. Summer, but in Wyoming the sun isn't that intense. What's best, to leave with top down or to leave it raised?
Thanks.
Armando

 

[2020]

If storing indoors, top up because trapped moisture is not good for vinyl.

If storing outdoors, top down because UV is not good for vinyl.

 

[menoco]

Thanks. Makes sense.
Armando