I don't have an SDS100 or 200 yet but listen using a SDR USB dongle and SDR# or two SDR USB dongles with Unitrunker and DSD+.
I listen to the Southern Nevada Area Communication Council System (SNACC) P25 trunked system. I live on the west side of the city and pick up the Mandalay Bay site with no issues. I hear Henderson, Boulder City, North Las Vegas police, and UNLV police. I also hear Las Vegas, Henderson, North Las Vegas, and Clark County fire and EMS. I hear McCarran airport operations and administration as well as RTC buses and Hospitals including UMC Trauma when people are being transported to them by EMS. This system is very active and I even prioritized or locked out some talk groups in Unitrunker so I don't miss out on the Police and Fire calls.
I also listen to the Nevada Shared Radio System. I pick up the Rio site super strong but also pick up the UNLV and Sunrise mountain sites. Doesn't seem to be much activity on these sites other than Nevada Highway Patrol and most of that comes from the Sunrise Mountain site. Rio site doesn't seem very busy.
Of course there are also the casinos to listen to, most using DMR. I seem to recall reading somewhere that security for Caesars properties is encrypted but am not certain. I do hear security at other casinos though.
I have attached a screen shot of the Unitrunker real time call history so you can see the activity. I used the Sentinel Database to label the talk groups I could find and changed the colors from everything being green to blue for police, red for fire, etc but hopefully you can see it. The upper window shows the activity at that given moment. You can see multiple talk groups talking at the same time so I had to change the priority number in the 'R' column so if someone comes on with a lower number Unitrunker will switch from what it is listening to to the one with a higher priority.