1st View EC 1165 and Host Mammoth

I would hate to by a 2000 and it not be able to keep up. I looked at the Yamaha ef2800i. It's extremely light(68 lbs?) has a 2.6 gallon tank. I'm not sure how they made it so light. Yamaha claims the rotor and stator are lighter than most. The Honda eu3000 weighs 137 lbs. which is about what the Onan LP2500 weighs. But that does allow to move weight to the front. This will be my first truck camper but have had 2 class A's and am currently selling my Freightliner Columbia class 8 rig(I use it for our race car business). I want a truck camper for ease of maintenance(I don't need one more engine to change oil in!) and also I want to be able to tow my boat and fish different locations around the U.S. It will be a adjustment in size I know, but mostly it will be just me using it.