I don't dress down. Don't dress up either. I do tend to do things like get on hands & knees & look under the trailer to look at who made the frame & how many spring leaves there are for the size of trailer. I also make a point of inspecting things like neatness of sealant beading before going near the door. This careful inspection seems to keep sales people away.
US RV base, MD
2007 Alpenlite 34RLR