Man I love this town. Plenty of great suggestions here already- don't sleep on Summerlin for some of the best food you can find, second only to China Town. Basically, every 3-5 star chef that ends up on the strip gets their menu together in China Town, it's the food capital of Vegas. Both are easy ubers and have amazing stuff everywhere.
I agree with
@TLDR20 if you wanna do a no-kidding Vegas strip stay, go to the Wynn. It's gorgeous, with great rooms, and they take care of you the whole stay. If you wanna spend a little more, get a tower suite, you have your own check in and a whole staff taking care of you, it's worth it. I'll throw some other hotels at the bottom, but the Wynn is ridiculous. Wing Li is one of their signature restaurants (cause you aren't getting a Four Sixes reservation unless you start looking now) and it's amazing.
Favorite off strip restaurants-
China Town- Sparrow and Wolf
Best Thai in Vegas, ate there last night- Le Thai downtown (on Fremont)
Brunch with bottomless mimosas everywhere. My favorite spot is in Summerlin- Honey and Salt (next door to another fantastic place, North Italia)
Hungover, way too big portions and great drinks- Hash House a Go Go (go to the one on Sahara, not the one in whichever casino on strip)
Shows-
Anything Cirque (I am a fan of O)
Anything Sphere - mind blowing
Van Gogh art exhibit at the Arte Museum (on strip, crazy good)
Absinthe is weird and worth it
Check the Cosmo concert schedule while you're here- small venue, outside, on the pool overlooking the strip, I saw Childish Gambino there
Fun stuff-
Atomic Golf, a local and cooler top golf with better prices, near the Strat and Arts District
Brookyln Bowl, always has great shows and bowling, near the Linq Promenade, which is also awesome
PopStroke- Tiger Woods' mini golf course- food, drinks, minigolf for grown ups.
Cool areas-
The Arts District near Fremont- it's the cool, hip place that Fremont was meant to be before it got super weird, near the Strat
Container Park- more family friendly vibe, tons of shops and cool stuff
Red Rock (easy hikes, not far from the strip)
Favorite Casinos/Hotels-
Circa Swim- something like 15 pools, stadium seating, huge TVs, you can chill in a pool and watch every game on TV if that's your thing
FontBleu- gorgeous, great rooms, new property
The Durango- south of the strip on 215/durango, hidden gem. New property, 5 star food court (from pizza by the slice to an oyster bar), great pool
Wedding Chapel-
Little White Wedding Chapel it's exactly what you're looking for, my brother got married there a couple months ago it was awesome. Pics in a pink Cadillac, elvis impersonators, Jordan got married there.
Also, hit a brother up when you're in town, I have a trip around the 20th, but other than that I am here we can link up for a dinner or something.