Looks pretty good to me. The WH will weigh something, but the amount of weight transferring back to the trailer compensates for a chunk if not all of it. At 7000 lbs a high TW would be 15% or 1050 lbs, so you'd have that ~450 lbs left over to play with for you, passenger, and junk in the trunk.
Is the express the real short wheelbase truck? If so you may have a little wobble, but different WDH setups could eliminate some of that too.
GL!
2016 Chevy Silverado 2500 CC LB 6.0L
1998 Chevy C2500 Suburban 454 3.73 (Sold)
2012 Ford F-150 EB CC 4x4 w/Max Tow (Sold) 😞
2013 North Trail 28BRS