Some harrys are fairly beamy, so the hinge would be more towards the lw end of thd beams so as to fold under.
I guess you can reduce the beam when folding by whatever bridgedeck clearance you have.
Or the deck and ww hull will start to get canted outwards.
The tris do both sides so reduce twice as much beam.

How much beam would the/a 10m camper need 5m?

Doug