YES there is a helmet law in NV & CA you can go without the lid in AZ & UT . You can go through Red Rock but that is only about a 20-30 minute ride if you start out on Charleston Ave it runs you into Red Rock you can stop @ Bonnie Springs it is a tourist trap but is a good place to get refreshments , then head to HWY 160 ( Blue Diamond HWY ) & head west & go to Spring Mountain Saloon its a good biker bar , you could keep going west to Death Valley but that is a all day ride so you should start early & take your LEATHERS because it is cold in the morning & evening & at higher elevations . You can go to Boulder City & if you stay on HWY 93 heading towards the Hoover Dam you will see the road going into the Lake Mead Rec Area , take that road north towards Overton NV it is a great road for riding & it will take you up to the Valley of Fire State Park . You can take HWY 95 south & go to Laughlin NV from there you could go across the river to Bullhead City AZ ( can take off the lid ) & head south & go to Oatman AZ it is a cool little old gold mine town & from there you can do some riding on Route 66 . That should keep you busy for a few days & dont forget your LEATHERS , also the Hoover Dam is a cool place but I would save that for later , when you rent the bikes you should ride as much as you can you can always go to the Dam in a car or on a tour bus IMO