On arrival at the airport a standard charge of US$ 5 seems to apply for a 10 minute ride to town in an aircondtioned van. There are quite a number to choose from outside the terminal. When getting a ride from town on your departure a tuktuk or small mini van(not aircondtioned) can be hired ,after bartering ,for around US$2. They can be flagged down anywhere.

Once at your accommodation, you can get around the main sites in town by foot (Mekong River, Wats, museums, restaraunts, nighmarkets) or hire a bike for as little as US$1 ($1 =10,000KIP).  There are quite a few places that hire them but note that there are periodic bans on foreigners riding bikes due to a few accidents. Or hire a tuktuk or a van. Traffic is very light down the main street, anytime of the day, which runs parallel with the street which follows the Mekong, about 200 metres away. There are a number of alleyways between the two which have guesthouses, boutiques, restaurants, markets and old french colonial buildings to admire.  You can also wander down to the river and negotiate a price for a few hours boatride to wherever.

To get out of town to see the caves or waterfalls or to go trekking there are a number of tour companies to choose from and that offer quite an array of activities. They are all fairly close together at the northern end of the main street. Some are owned and run by ex-pats. 

The town has a population of about 30,000 people and most people can understand a little english. It is safe to get around day and night.

UNESCO has put quite a lot of money into the town because of its heritage listing so there a quaint street lamps, paved footpaths and  streets in most parts.

A fascinating place to spend 3-4 days.