I would'nt worry much, just get some dual sway bars.

My 18ft toy hauler dry weight 4370lb. now add 100gal of water and everything else, comes in around 8k last time i weighed it, but being only 18ft and people seeing it, they would not think it would be that heavy and nobody would say it was to much for a 1/2 ton truck, but in fact weighs the same as these bigger 24+ft trailers. I have no problems towing it with a older 1/2 ton dodge.