Looking at
Clark County in the database, most of the agencies you are looking for are on this system:
Southern Nevada Area Communications Council (SNACC) Trunking System Profile
www.radioreference.com
I see a number of the casinos that are using DMR. If those interest you, then add the DMR upgrade.
Look at the site map for the
Las Vegas Simulcast:
View attachment 85504
You've probably seen a number of posts concerning Simulcast, to the point it seems like a broken record. But is can be a serious problem in some locations. In a simulcast system, you have a number of transmit sites, all broadcasting the exact same conversations on the same frequency at the same time. That's to ensure coverage in the area, as well as inside buildings. The 'professional' radios carried by users of the system are designed to work with that. Most scanners are not.
Whether that affects you, or not, is very closely related to your location. At your location, the transmissions from the various transmit sites arrive there, carrying the same conversation, on the same frequency. But, depending on your specific area, they arrive at varying times. Yes, we are talking about very slight time differentials between those in range for you. But that can be enough that either you can't receive the system at all, with many scanner models, or it tends to be garbled, and missing some transmissions. If you are very close to one tower, such as within a quarter mile, that very strong signal can, at times, can be enough that the scanner is not affected by weaker signals, from more distant sites. Or, if you are lucky enough to be where surrounding hills, or maybe a cluster of buildings, blocks enough of the out of synch transmissions that the scanner can handle the system. It can be so location specific that even moving your scanner a few feet in one direction or another, inside your house, can make a difference between not getting the system, to receiving it with few problems. For a more detailed description on Simulcast Distortion, see this page in the Wiki.
Simulcast digital distortion - The RadioReference Wiki
The map above is what the database pulls up for the Las Vegas Simulcast site. But, the map is a bit misleading. Those tower locations are derived from the FCC licenses for the frequencies. As you can see, near the upper right corner of the map, there are two call-signs. One of them, which I've highlighted, has a number of the simulcast locations.
But, that license, WNQU894, is also shown on the maps for the first three sites listed for this system: Black Mountain, Apex Peak, and Angel Peak. So, some of those tower sites are not in the simulcast. Instead, they are other sites. I can't guarantee you, for sure, as to whether or not Simulcast will affect you. If someone near you adds comments, on what works for them, then that will give you a better idea. If Simulcast does turn out to be an issue at your location, then your best choice of the scanners listed is the SDS200. It was designed to handle simulcast. If you want to roll the dice, and try the 996P2, then buy from a dealer or other source (like Amazon) that allows returns without hanging a large restock fee on you. If the 996 works, keep it & get the BCT15X. Just keep in mind that most of what you indicated interested you, by far most of that is going to be digital, either P25 or DMR. The 15X is a good, analog, scanner. Useful for conventional and older trunked systems (that are not digital), along with aircraft.
For the Nevada State Police, it appears that they are still using their older EDACS system:
Nevada Shared Radio System Trunking System Profile
www.radioreference.com
But, for some locations, they show some conventional (non-trunked) frequencies.
Scanner Frequencies and Radio Frequency Reference for Department of Public Safety (Nevada)
www.radioreference.com
Maybe someone in your state can clarify what you need to look for in monitoring that agency.
Las Vegas PD is on this
system. But, as just about all of the talkgroups are encrypted, you would not be able to hear them no matter which scanner you buy.