Yes. Kampot is about 25 km (16 miles) away, close enough to pair the two comfortably. Many travelers add a stop at a Kampot pepper plantation or the riverside town itself before or after Kep, since a private transfer can route through both without doubling back on fixed transport schedules.
Half a day covers the essentials: a couple of hours for the crab market and waterfront, plus a hike in Kep National Park. A fuller day lets you add a boat ride out to Rabbit Island or a slower loop past the abandoned villas. Since Kep is compact, a private transfer lets you decide on the spot how long to linger at each stop.
Rabbit Island, or Koh Tonsay, is a short boat ride from Kep's pier and offers a quieter, undeveloped beach with clear shallow water. It's worth it if you have extra time and want a swim or some downtime after the market and hike, but it does add a few hours to the day, so it's best for those not tightly scheduled elsewhere.
The market is a row of stilted wooden shacks over the water where vendors sell crab caught that morning, often served stir-fried with local Kampot pepper. It's less a market to shop and more a place to sit, eat, and watch the fishing boats come in. Arrive around midday for the freshest catch and the liveliest atmosphere.
Kep is Cambodia's quiet answer to the coast: a former French colonial resort town that never got crowded. In one visit you can eat crab straight off the boat, hike a jungle-covered headland, and wander past crumbling modernist villas reclaimed by vines. It's a slower, more textured stop than a typical beach town, ideal if you want scenery and history without a packed itinerary.
A loop trail of about 8 km (5 miles) circles the forested hill behind town, taking roughly 2 to 3 hours at an easy pace. The path is shaded most of the way and opens up at a few lookout points over the Gulf of Thailand. It's a manageable hike for most fitness levels, not a technical trek.