i ordered my dress 10 months out it came in 6 months before the date my streamstress said that any dress can be brought down 2 sizes so unless you are planning to drop more than that i would order asap
what budget or theme are you going for in las vegas really there is so many options i can help you out since i have family there and havevisited but i need an idea to go off of are you looking for something elegant funny themed????