make sure to wear blatantly obvious bachelorette clothing and ALL DRINKS will be free. You become a magical creature and everyone just wants to contribute. It's really amazing.
May I suggest a drag show. Seriously.... one of the most things I have done in Vegas for a bachelorette party. We did a dinner show and it was AMAZING. Then we went and did drunken party things.
If you must wear heals, wear peep toes and tape your feet with medical tape anywhere that is covered.
I'm assuming since you are flying into LA, you are coming from a more humid area. Your shoes won't fit the same. So like I said, tape them. and on your heal, use a piece of mole skin to keep from getting blisters. Same for just on top of your toes. It will work wonders.
Otherwise you will be left with bloody feet cause the dryness and foot shrinkage tends to have an effect that everyone blames on the shoes.. it's the climate.
Ummmm thats all I can think of right now. All my college friends seem to be getting married... so i've been on a lot of vegas trips the last few years.