I have been reading that the Taxi's are a real rip off in Samui!

If I am staying in Maenam beach is there regular songtaews to Chewang and other beach areas? if so what are the prices?

I intend to get a step through while I am there but dont want to ride back from Chewang if i have been drinking.

Also Taxi prices from Samui airport to Chewang and Maenam.

Thanks Den.