We just got back 5 days ago (WAAAAH)! I didn't bring my kids, but not because I am against kids in Vegas, we just wanted to relax! We stayed at the Mirage - it's the only place we've ever stayed. We got a really good deal on expedia for room and flights.
A few thoughts: Vegas is EXPENSIVE! Drinks are free if you are gambling, but even a small bottle of water cost us $4.75! If you have a car, try to find a Target to stock up on some things like water and snacks.
NO CAR! Traffic can be terrible! When you're in Vegas you can get a 24 hour bus pass (The Deuce runs 24 hours) for $8 per person and it stops at basically every hotel on the strip.
Another great tip is to sign up for an M Life Players card. There are 2 apps, My Vegas Slots and My Vegas Blackjack. You can play them for free and redeem for real rewards - hotels/meals/shows/etc. I only discovered it 2 weeks before our trip and got 2 bogo buffets - one at Bellagio and one at Mirage. M Life casinos are Mirage, Excalibur, Luxor, Mandalay Bay, Bellagio, Monte Carlo, Aria, Vdara, Circus Circus, MGM, NYNY, Red Rock and some others!
We were there for the EDC (biggest rave in the world or something). We had no idea, but Vegas was quite crazy (and not a lot phases me). Once that was over and everyone left, it was back to normal crazy LOL. There weren't people making out in the pool or walking around naked or anything. There were lots of kids and everyone was super friendly.
It's smokey everywhere!!!! I would think all the hotels have non-smoking rooms. We stayed in one and it was perfectly fine. People smoke at the pool and basically everywhere.
Also, it's like 110-115 degrees every day. It was like being in a dryer. Even with a breeze, it was a HOT breeze. We walked around at 10:00 and it was still 99!!!! We did have Frog Toggs to keep us cool, which was great! At least it's not humid!!!
Check out Madame Tussauds Wax Museum, The Cirque shows, The aquarium/shark slide at Mandaly, the Dolphin/Tiger Habitat at Mirage, the rides on top of the Stratosphere, the NYNY Roller Coaster and the huge new Ferris Wheel - Those are things your kids would probably like!
HAVE SO MUCH FUN!!!!!