I've been backing fivers for near 30 yrs and while I've never had a site I couldn't get into, I disagree with most. Maybe I'm just not proficient as everyone else. But I would say the opposite, I could put a 36 ft TT into the space as a 30 ft fiver. With a TT you have to be careful because it reacts so fast. But with the slowness of a fiver, it is ez to run out of maneuvering room for the tow vehicle. Now if there is plenty of room in front of the site and the only issue is how sharp the trailer needs to be jack-knifed, then the fiver might be better. But since the CG is saying the fiver won't work, I would go with their judgement as the only knowledge and eyes on the site rather than inputs here. My $0.02.