You walk into the sun-drenched room, padding across alternating swathes of slate tile and plush carpet. In the kitchen, your friend slices veggies atop a gleaming granite countertop, which will later top the burgers cooking on the stainless-steel gas grill outside. A cushy sectional beckons for you to curl up and watch a DVD on the flatscreen TV, but instead you decide to head up to the roof, where a few companions are sprawled out on lounge chairs on the expansive sun deck.

Though it sounds like this scenario could only take place on the French Riviera's star-studded coasts, River Ranch Boat makes it possible with luxury-houseboat rentals in the Northwest. The 59-foot beauties are appointed with contemporary furnishings and fixtures, sleeping up to 12 adults and holding parties of up to 25 during the day. The vessels, which can be rented for weekend or mid-week sojourns, also have an on-deck waterslide that deposits riders right into the Snake Rivers.

Those looking for single-day adventures can rent one of River Ranch's pontoons, which hold 12–16 people depending on the vessel. There is also a fleet of pleasure boats––speedboat-style watercraft that can be used for fishing, tubing, wakeboarding, or revving the engine to scare away lingering ghost ships.