Just got back from Fraser and we were flogged with high winds and rain for the first few days and the last couple, we had a grassy spot in a depression behind a dune so were reasonably protected ... did have a couple of the 350mm supa pegs get pulled out, so quickly repinned them with 500mm supa pegs and no more troubles..
When we took them out on pack up they had a fairly big bow to them, from the preasure they had copped from the winds..
Just a note on guy rope set ups with springs, We have found over the years that it is better to replace the springs with rubber O-rings, they have way more give than springs and dont go solid when compressed like springs do, thats when pegs usully get pulled out or damage to tarps etc etc happens .. these O-rings will stretch a hell of a lot further with out the damage..about $2.00 ea at caravan canvas awning makers shops