We have the 2017 STC. When I was very curious about what we were loading, I whipped out my "highly accurate" bathroom scale and summed up the weights. Go ahead, laugh.
FIXED:
Standard+AC+awning	  3354 (given)
Heki	                  20
dually brackets	          22
bunk	                  80
foot rest + extra cushion  10
maggie rack	          30
camera + gen tray           20
TOTAL DRY	         3536
	
FLUIDS:
44 gal H2O	        380
propane	                 40
TOTAL TC FLUIDS	       431.2
	
So, TOTAL WET (minus batteries, we have lithium and solar panels added for 309lbs)     ~ 3970
ADD your RIGGING:
front bed bumper board	9.4
bedmat	                40
Torklift+stableloads	105
pass-through boot	4.8
Timbrens	         10
TOTAL RIGGING	        169.2
So, 
   4136 
+ batts and other electrical stuff 
+ ca. 500lbs personal stuff for 4 people for 2 months
is total wet weight as we have it spec'd. We only took it to the scales once but didn't have a good baseline at the time. Don't know how close we are to manufacturer's weight.