What is the best way to get from Hat Yai to the Wang Prachan border crossing in Satun for a single day border hop? I understand that this border crossing is not the closest to Hat Yai (the closest ones being Sadao and Padang Besar), but it seems to be the easiest one, as border run companies take hordes of Russian people from Phuket to this border crossing. My question is basically about the transportation options, as I haven't found any direct routes from Hat Yai to Wang Prachan.