I'm sorry, I know you want to travel to Krabi and Hua Hin but if you go to visit the province before. You have to ride a van or taxi to Hua Hin. You could be wasting more money on the go. Because of the car and I asked the tour with your brothers at my work. I suggest to you that will travel to Phuket instead. It is a beautiful place, very much like the laem phromthep I ever tell you. And easy to access.