I used four straps when I transported my ninja. The guy had ramps so getting it in was no problem. Getting it out we used my Gorilla latter. Not the way I would recommend but it was easier than just lifting it out of the back of the truck. The truck I used had a short bed and we had to drop the gate to get it to fit. It was a lot easier than I thought it would be, and four straps keeps the thing locked down.
If you have four guys 300lbs, while awkward, is very doable.
“I am the best there is at what I do, and what I do ain’t nice.”-Wolverine