Tire Wear

I have a 2013 Winnebago One 29L trailer. It is not qiute two years old. I have been noticing that the tires on the drivers side is wearing too much for their age. I just put on a new tire less than 3000 miles ago and noticed that it is wearing too quickly. The trailer trackes well and seems to be rolling correctly. My pop-outs are on the same side with the refer on the opposite. I do carry a lot of weight and don't always dump when I should because I live in the west where there is a lot of wind so I use the black and gray water tanks as added weight to help with the wind. I just blew a tire, an original, coming back from a trip and this is on the same side. The two originals on the other side are still looking good. The bad side I do put up on blocks when not in use. So my question is this, why would I have so much trouble on one side but not the other? Should I always dump tanks no matter what and not drag around the added weight? Does keeping the tanks full have any effect with strong winds?
I know this are a lot of varibles but after owning two other trailers without these problems it is a bit frustrating. Thanks for any suggestions.