Hi Kezz,
have a look at www.cathyandgarystravelpages.com
Cathy has a list of recommended drives but there prices are a bit outdated. Email them and they will give you a price. We booked Mr Mai for 1500bt for a 8 hour day. Also check out her activities and the Friday Night BBQ which we are going to.
Plan to see Wat Chalong,Karon,Kata and Rawli beaches, Big Buddha, and Phuket Town to name a few.

Hope this helps

Cheers

Karin