There are no issues at all with lowering the gear once landed on the water and then taxiing out to either a hard stand...ie Hayman Island loading paxs then sliding back into the drink and scoot off. Nor is there any issues doing the same on a hard and smooth beach ( obviously a known quantity ) and cruise on out of the water chill out with the punters in their bikinis thenpiss off again. The advantages of this are you dont really need to tend the A/C whilst doing other things...ie perving on said pax. Saying that if the beach on the shore or break line is a bit steep its much easier to hold the tail of A/C on the beach and its only a small step off onto the beach
Both Cairns and Whitsundays run straight float A/C which live permanently on the water. Cairns A/C are on moorings outside the harbour the others tied to a pontoon. Whitsundays also have amphibs as do many other places. I know in Broome the machine is not insured for sleep overs on the drink.
Many traps for floats but the biggest thing I have learnt that will save is bacon TAKE YOUR TIME.