I was wondering if anyone would happen to know the dry weight of a 1991 25.5ft prowler 5th wheel trailer. It doesn't have any pull outs. Thanks

A trailers "dry' or "shipping" weight is totally meaningless. It does not even correlate with anything to do with the trailer in question. The trailer had a Dry weight affixed by the factory to satisfy marketing. It generally means a base stripped trailer with nothing in/on it. If you want to have a good number to use as a judge, look on the left (street) side front corner. There will be a tag giving the axle weight ratings and the trailers GVWR. Those are the important numbers.