Sorry should have thought to mention the mozzies.
There were rumours that they now spray like many other resorts - is the
Icmeler mozzie man still around? Erring on the side of caution I took a spray called Buzz Off Extra Strength (Superdrug own brand) and used it morning, afternoon and evening. Also substituted lemon handwash for soap/shampoo. It was very hot so even at night I went out in 3/4 or shorts and short-sleeved shirts as pretty much everyone else did and apart from the odd bite had no problems.
Not sure about the
ICR version of the trip but I remember seeing reference to others offering at least one-way by bus. It might be worth asking at the office when you get there or, perhaps Donna or 1 of the others can advise before you go. The river is calm enough and, though the lake can get a bit choppy you would not go far out into it.