For phuket I would have said Kata or Karon over Kamala personally but if you've already booked it's as good as any I suppose. We always used to base ourselves in Patong when we used to go to Phuket. Some love it, some hate it but it's ideal for families as everything is in one place with loads to do and easy access to better beaches both north and south. Kamala is only 10mins up the road from Patong though. Im not really a beach person a nice beach in between kamala & Patong which is pretty quiet is Laem Singh. Kata Noi is a nice beach just south of Kata and I also liked Paradise beach too.