I just measured my 96 1500 with a lehman trike kit and a four and a half degree rake kit it is just a tad over nine feet long,even if you have a eight foot bed you are going to have to keep the tail gate down and if you have one of the shorter beds ,you are going to be out of luck.
You need to measure the total length of your trike.
I know there are several good units out there like you are talking about but since I have no experence with any of them I can not give you any advice on which one is best.
Another thing is I would be sure to measure the distance from the back of your truck to the front of the trailer with the tail gate down.
I am not sure I would want to pull any trailer with the tail gate down,because if you have to make any real sharp turns you could end up with the tail gate hitting the trailer as well as your trike doing the same thing.So I would do a lot of measureing before you decided what you want to do.