2015 Dodge Durango R/T 5.7 Hemi capable of towing this?
X2 for the tongue weight not being a concern. You are adding almost 1000lb behind the tires so that will unload the weight on the SUV big time. I would bring the bike to the dealer and weigh the RV at the hitch. With any SUV, payload will be your biggest enemy.
Also, at 30ft length, consider a Hensley or ProPride hitch.
Bob the frog from Montreal
2009 Flagstaff 227 pup (Sold in 2014)
2015 Wildwood 261BHXL
2010 Mercedes-Benz ML350 Bluetec
ProPride 3P Hitch