when we went on an organised boat tour we travelled on a boat called "HANAYDEN" (think thats spelt right), the food was lovely, there was plenty of room on board and they have a water slide that you go into oon the top deck and come out the side of the boat at the bottom which is great fun if you fancy that.. It was a ferw years ago so not sure of prices now but we paid £5 per person, food included.