The 2011 26Bh is 29ft long and has a GVWR of 7,500lbs .... with a generous CCC. Based on a 13% to 15% loaded tongue weight, and assuming one loaded to the 26BH's 7,500lb GVWR (maximum weight), that would be a 975lbs to 1,125lbs loaded tongue weight.
IMO a 1,000lb minimum rated WDH should be considered, thus accommodating most loading conditions.
2016 GM 2500HD 6.0L/4.10
2005 Jayco Eagle 278FBS
Reese HP Dual Cam
Putnam Class V