Using the dry weight only is asking for trouble. The only way to go is take it to the scales. ( CAT scales are probably the best ).
Often dry weight is without propane & dealer added options. I would only use dry weight (yellow sticker) only as a starting point. Our case is very different but our trailer dry weight is 9600lbs (yellow sticker), loaded ready to camp is 13,900 by CAT scales. Huge difference. I wish I had taken it to the scales before I took it home
just to see how far off the sticker may have been.