I would suggest the RV I beleive its the biggest inclosed trailer. It has surge brakes dual axle.
I have pulled the 5x8 from Az to Montana at speeds pushing 80 or so and no problems.
The RT ramp trailer we used in Montana we bounced that sucker on multiple 16 mile round trips on very rough dirt roads then the trip over to Butte to the dump or recycler.
on one trip I had the weight distribution screwed up and it tried to pass me, not good....
The other trips I had it dialed in and it pulled at 80 or so as well.
I have pulled the 5x8 from Az to Montana at speeds pushing 80 or so and no problems.
The RT ramp trailer we used in Montana we bounced that sucker on multiple 16 mile round trips on very rough dirt roads then the trip over to Butte to the dump or recycler.
on one trip I had the weight distribution screwed up and it tried to pass me, not good....
The other trips I had it dialed in and it pulled at 80 or so as well.