Various sorts of river trips out of Kampot up and down the Kampong Bay River are available. There are now a few places offering different types of regularly scheduled upriver cruises including mid afternoon scenic cruises, evening sunset cruises and ‘firefly cruises’ and there now is even a wine and dinner cruise on a boat formerly used as a royal vessel.
Most guesthouses and tour operators in town can arrange tickets for you. You can also get info and tickets at the cruise boats that sit riverside opposite the Rikitikitavi hotel most of the day.
Going the other way, downriver trips from Kampot to the ocean let you explore beaches and sand spits near the river’s mouth and do a bit of ocean swimming. Some tour operators can supply basic fishing gear.