595 lbs for tongue weight. Add 2 batteries @50 lbs each =100
Round up the 595 to 600 lbs for ease of speculation.
Now you're at 700 lbs
Add propane @ 60 lbs = 760 lbs.
Add 100 lbs for a WDH = 860 lbs.
Add 200 lbs for stuff under the bed, in the wards and in the front storage compartment = 1060 lbs.
Pure speculation and assuming the TW is 600 lbs from the factory.
As far as the UVW plus GCWR goes, I don't worry about the GVWR unless the CCC is low. You'll never load the full CCC in that TT so figure on average 1000 lbs added to the UVW as a start. That would put you at about 6500 lbs ready to tow.
Your trucks payload is too low for this TT IMO.
Brochure weights are never correct. They may be close but very rarely are they higher than a delivered unit is. Normally they're low.
My last 5er was pretty close but my current TT is way different.
You can always call a dealer and have them get the as delivered weights off the factory sticker thats on the TT.