Mick, it isn't a lagoon. If you've fished in the estuary and rivers systems in the NT or North Queensland, that is the type of country we will be fishing inside Shoalwater Bay. Realistically, 4 minnows will do the trick. Say two deep divers and two shallow divers and maybe one packet of plastics. You won't need any more than that.
You'll be able to get away with a fair bit more weight than that on this trip, Mick. We're being picked up by the Odyssey at Yeppoon and then on the way back, we have eight of us on two floatplanes. Personally, I don't think 30kg would be a problem but of course, it is up to you to do battle with Qantas/Jetstar/Virgin.