NEGATIVE..I once towed my Fastliner to Scotlands West coast,I put all our camping gear and boating/fishing kit in the boat.It made a wonderful trailer...Except,9 punctures 2 new tyres,and the final exasperated purchase of 2 new wheels and tyres complete from a Halfords in Glasgow.Ah those were the days,no rules about overloading etc.
POSATIVE. I have an Airbag Jack which goes under anything and will lift a boat on trailer easily,even on sand/mud/grass etc.powered by the vehicle exhaust.It packs away in a small holdall.[ military use them].My campervan is too heavy and too high for it. If anyone is interested they could give it a try ,and if any use,put something in the club funds..jack