Roof top campers not tents.

Hi all,

I'm hopping that someone out there will have first hand experiences or knowledge of long term travel in a roof top camper. The style I'm talking about are like the Aussie Traveller or Ship Shape (I think that's the spelling)not the imported ones we are starting to see now that are basically a tent on the roof. I have a 3.0l petrol GQ patrol and in the very near future will be organising a trip around Aus for about 12mths. It might sound a little long in a camper like this but I've decided it opens up a lot more opportunities and when we get sick of it can rent a unit or caravan for a few days.

My questions are: how well does the Patrol's roof handle this weight plus 2 people on top for extended times, does the gutter crack?; are they really water proof as they state?; what long term problems have you heard of?; and most importantly where do you suggest is the best place to buy them second hand?

I'm in a regional area so not sure of what would be the best medium to look at for purchasing a second hand model when I'm down in Brisy next week.

Any and all suggestions are appreciated.