Just make sure the receiver is actually designed to be used towing trailers. I don't believe Dual Hitch receivers are rated to tow trailers.
You could also consider a ball mount that has a receiver on top but the ones I have seen are limited to 750lbs tongue weight. But, then, I wasn't looking too hard either.
Let us know if you find something that will tow that much trailer and allow a bike rack.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD