We got away for a couple of days at the Hyatt Regency Lake Las Vegas Resort this past March. It's a half-hour drive from las Vegas.
Very luxurious, nice staff, Wonderful location. The Hyatt and the neighboring Ritz have created a tiny little village for themselves. it's like an Italian coastal town. Pretty bright-colored buildings, charming walkways, some shopping (like a Piazza), really peaceful. Mountain views from all around [even the parking lot].
It's not crowded or filled with people. For that, stick to the Las Vegas Strip. Or if you want to get away, but come to the Strip for nightlife, it's totally doable.
A friend, an avid golfer, was ecstatic with the place. Loved it.