This is a complicated one. Rental vehicles, including motorbikes, are nonexistent in Tak. Tak town centre is not very big and you can easily walk around it in less than an hour. There are some samlaw's which hang out at the various 711's and I'm sure wherever your staying will be able to advise you. When travelling at night, other than along the Riverside, refer to the above dog situation.
When arriving at the bus station,there are Tuktuks,which can take you wherever at a reasonable price.
