Hey Camper! Our X23B was 4420# loaded and we had 600# tongue weight. As everyone points out your weights will be different. We tended to pack pretty light (I think). Our TV was a 2003 Expedition 5.4 which did a pretty good job towing and delivered 9.x mpg - never broke the 10mpg barrier.
Although the GCW (10380#) was comfortably less than the GCWR (14500#) our rear axle was pretty close to maxing out (GAWR-Rear 4128# and the rear axle weight was 4040# with no spring bars and 3800# with the bars. That was with the bride, myself and the wiener dog. With the son, DIL, G'son and their baggage I'm sure we were "heavy".
Since you have the TT and TV already I'd suggest a trip to the CAT scales. It'll cost you $14 to make the 3 trips across the scales, in return you get a very clear picture of your weights. Be sure to go loaded as you would for a trip.
We loved our X23B and tho we've recently traded to a 351RLTS we do miss it, hope you get many great miles and memories with it.
Keep posting your questions and discoveries here, you'll find this forum an incredible source of knowledge and experience (and quite a few opinions
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks