been there, done that taking dirt bikes around. Even with them weighing in around 250lbs and a 10,000lb trailer, it's pushing the limit of capability if it is on the back of the trailer as far as reducing tongue weight, not much option there. Front reciever, bike sits to high to give visibility.
So.... while it isn't the first choice, the reality is the best choice is in the pickup bed. Get long ramps, a buddy helper, and NEVER ever Ride the bike up. I do power mine up, but walking beside it. one ramp for you one for the bike.