Your choice. We store ours with stabilizers DOWN as it is MUCH more stable in the wind.
Chuck
Wonderful Wife
Lovely German Shepherd.
1999 Mercedes ML320 TV
2003 Wanderer 187TB Toybox (3620# UVW, 4800# loaded) Not yet camped in Hawaii, 2 Canada Provinces, & 2 Territories. I can't be lost because I don't care where this lovely road is going
My opinion is any RV, regardless of type, should be stored in "road ready" condition. This means stabilizer jacks up, slides retracted, etc. The reasoning for this is, if any of these systems fail during storage (and they do), you will be able to move the unit on the road, to a repair facility or campground if necessary. Imagine storing your RV with the slide extended or stabilizer jacks lowered, and it seizes in this position. You discover this problem a week before your family trip - it puts a bit of pressure on getting the repair done quickly.
The inverse of this happened to me two years ago - the slide bearings froze in the retracted position, making the kids' bedroom area inaccessible. I found this out 2 weeks before a trip to Acadia National Park, so had to rectify the situation quickly. I travel frequently for work, so it made for a hectic schedule for me. If the slide had been extended, it would have been more of a stressful situation.
2003 F-250 6.0 Powerstroke diesel, 4x2, crew cab short bed
2004 Cardinal T31BH travel trailer