Dan, what was the wind & waves like at Gnaraloo?
In light Westerlies I often get out my 5m FlySurfer Maniac & DirtSurfer along the bike path at Scarbs - see:
&
www.dirtsurf.com/ Awesome fun! Good value downhill when there's no wind too! Been clocked at over 70km/hr with the kite - the faster you go the more stable the DirtSurfer is - AND they have brakes so you can slow down around pedestrians, etc. Had a blast along the highway outside Carnarvon last trip up to Gnaraloo :-) They also feel MUCH more like carving turns on a surfboard rather than a skateboard.
I wouldn't recommend DirtSurfing, buggying or skateboarding with any kite that didn't have a safety leash - the pressureless depower system on the Maniac is also very nice when DirtSurfing. BTW the 5m Maniac is also my favourite kite for doing kite-loop/back-loops and wave riding in 20 knots+ too :-)
Cheers,
Ian Young
www.flysurf.com.au
0414 716 812