Since I'm not familiar with your particular trailer, my suggest may not be applicable. On my first Wildcat MAXX, I also had water inside my storage compartment even though I was sitting still. As it turned out, my unit had the storage door which is hinged at the top with the latch centered at the bottom of the door. Where the portion of the door latch that attaches to the trailer ( not the door) there was a total lack of sealant. When it rained, the rain ran down the side of the trailer, around the outside of the door sealing rubber and right into the latch assembly then on thru to the inter storage compartment. After silicone sealing this portion of the latch, all is well!!!
Days camping (2015)----88 days
Days camping (2016) ---110 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi
30 years RV'ing
12 different RV's