To the gentleman asking about a Landrover Disco:
Be wary of the tow ratings. Rover used to rate their maximum towing capacity based on having the transfer case in low range. That would give you a top speed of about 40mph.
So, in theory, the Disco could tow the big trailer, but only in low range where the torque is basically doubled. But, the rpm are doubled also.
Anyway, it may be different now than ten years ago, but it's worth looking into to be certain.
A Disco has a fairly short wheelbase too. I wouldn't think one of those would be a very good tow vehicle for any trailer much over 22' or so. But I could be wrong.
Me, I use a Dodge Ram 4-door long bed 4x4 (I wouldn't own a 2wd truck) with the Cummins turbodiesel. I haven't hit a hill yet I can't accelerate up and she's got the chassis to pull my 34 footer with ease. I don't get stuck either
Take care,