What size trailer would be best for 3 expeditions without a lot of messing around? Basically just drive them in and strap them down. Each total sled length is about 128.2in. which would be just about 10.5 feet.
In the past guys have recommended parking them in a garage or shop and using tape to mask out where you want them and the dimensions required to achieve that. A lot of it depends on if you want a V nose or flat nose, front ramp door or not or want to drive two in and slide the tunnels to the wall and back in the 3rd. Also 7' wide or 8' wide.