You sound determined and mindful and I know you will get through it sober!!
Vegas is a big trigger for me - a big one - and even though I've got time and no desire and I'm doing well at almost 1.5 years I've made a conscious decision not to ever step foot in that city again with friends or by choice. I commend you for your resolve in a place where it is soooooo challenging.
I too will have to hit Nevada for work - albeit not the strip but close - and I know that will be fine but it is definitely a challenge.