I leave mine up for the winter. I don't see any need for them to be down. My TT is at a storage lot, so if I had a tire go flat, it my be awhile before I would know it. Which could put more stress on the jacks than I would like.
Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)