I live in vegas 18 years now and just got a canam maverick max a week ago. you can ride several places, depends what your style is. I have had and rode here for 5 years other sxs.
for sand, apex, out by the military base is a hot bed. trails, cold creek is nice and cooler temps, other sand dunes is armgosa, nice deep bowls, its 2 hrs north of vegas, Kanab Utah, great trails and 2 hrs away. also around vegas lots of riding south of boulder city, many trails, mesquite, nv just east you can ride to grand canyon. out by state line/nv.ca border. around mt Charleston.