Been there several times for NYE, and it's quite the party. Many of the luxury hotel/casinos lock down fairly early, and you have to have a roomkey or purchased wrist band to get in if you leave. Some of the smaller casinos are open. The strip is blocked off to vehicles very early. Crossing LV Blvd gets fairly tough after dark. There are cordons down the center for police and EMS. About 10 pm, it gets pretty crowded on the strip. By 11:30, it's SRO until well after the fireworks. A short time after midnite, access is opened up again. Fremont has been wide open until the last few years. Now you have to pay admission to get in. We stayed at MSS last NYE, and still had to buy access. You can get in and out of the casinos fairly easily all night. Fairly easily is qualified, however, because of the mass of humanity. Wifey and I have enjoyed Fremont much better than the strip. My sis and b-i-l prefer the strip. But they're wusses.