Correct — gambling is banned inside city limits by charter dating to the federal construction era. The nearest slot machines are at Hoover Dam Lodge on US-93, technically outside the city, and at Railroad Pass Casino just before Henderson.
Day trip is enough for most people. Overnight makes sense if you’re doing an early dam tour, a Black Canyon raft, or the River Mountains bike loop — you’ll want to be out at 6-7am before it hits 100°F.
Live prices for every hotel and inn in the area — free cancellation, updated daily.