I think I know that spot. There's a spot that would be easily accessable by foot that I've pulled few ECs from, albeit from the canoe/yak/boat. I'd imagine a lot of lost tackle hitting that spot land based, though.
Todddo, my mate just bought a perception swing kayak off ebay this week for $600. Looking over the auctions, there's been a few Perception Swings sold in that price range recently. They seem to have once been the Gold Standard for fishing yaks. A great yak for the money, if you can wait and find one. I fish my yak in Tingalpa creek all the time (actually, the only place I use the damn thing). Plenty of flatties out of the mouth around the sand bars.
Edit: that yak in your link might be OK for the money, but I'd personally be looking at yaks in the 3.8-4.2m range.
Check out akff.net/forum