My Camper weighs in at closer to 500kg (900+lb) (no brakes fitted as yet) have towed it some major miles (approx 40,000km) I keep about 15% on tongue and have no issues you have to be aware that you cant just plough into corners as you would with out a trailer and always allow plenty of braking distance and use your gearbox and engine braking on going down Mtn passes not your brakes so much and you should have no issues