Any reasonable load under the queen will not damage the trailer.
On the road side, near the door, I keep all of the hookup items such as water hose, kneeling pad, wheel chocks, etc. The only real heavy thing I carry in that area is my auto transformer.
Under the bed goes folding table, patio rug, dutch oven, etc, etc.
I carry my water and soda up front, under the couch.
John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2013 Silverado 2500HD Duramax/Allison LTZ
WBCCI #9632, TAC TX-10