I done this site a few years ago with the jeep club, there's also a good offroad site outside the caves with plenty to do for all types of vehicles and an area for camping / bbq's, the caves itself was a bit low for disco's etc with some of the drops to steep and the rear of the roof rubbing the roof of the cave,if i remember right it was organised through mudpluggers and the chaps name was Eric, well worth a visit as he also took us on a tour of the local greenlanes(tame) and a tour of the 1st ww sites in the area.
Hi Jase, as have been said don't overcomplicate it. if your going to fully submerge it for a long periods you will find many problems to solve (trailer and towing vehicle)if not just find a normal shut off vent and sit it high, your fridge should keep cool for a fair time switched off to cross any ford or river, remember the force of flow to weight of trailer if you go in to deep. Keep up the good work (don't forget the photo's)
without any doubt the 110 is better on general off road driving, more control in ruts, grips better uphill and more control downhill,smoother ride at speed over bumps,etc,etc,....90 better at tight turns and power to weight ratio,also less strain on winch.
Hi Jason, i have made several trailers in the past and i agree with most of your build so far, a couple of things i would like you to consider would be a decent hitch with a lock built in, (i have a 2500kg one floating about if your interested) also i prefer the electrics from vehicle to trailer to be on a seperate cable, i used tractor unit lorry coiled suzi cable conected to plastic female conectors as the metal ones corrode quite badly, also the removal of the suzi when parked also acts as a theft deterant as the trailer will have no lights when cable removed.