If so which one? 

I used a MUA - myself.  ;)

I've heard that Glam Squad is good. http://www.glamsquad702.com/

I really thought about using them.. But Im just not sure.. 

Do you want me to come out out Vegas that weekend and do your makeup for you?

Thats a long trip to do my makeup...:) 

It's only a couple of hours for me.  :D

Here a couple of makeup artists that I've heard great things about.

http://www.projectwedding.com/vendor/show/lori-white   - Lori has amazing reviews!

http://www.lasvegaswedding-makeup.com/index1.html - Their work is great!

http://www.lasvegasbridalmakeup.com/  - Nice portfolio.

Thank you so much Tiffany!!!

I need to start looking into MUA really soon...

I will be using Lori.  She has been so nice in her emails to me and comes highly recommended.  She charges $200 for the bride and $100 per attendant and will give you a trial run before your wedding.  I'm really excited about the free trial run so I can look great for my last night out.

I am! I have a friend that lives in Vegas thats a cosmotologist. She will be doing my hair and makeup and also my MOH's hair. The other two bm's want to do their themselves. My friend will be doing a trial for me the night of the bachelorette party (2 days before the wedding)