I have stayed in the following Las Vegas campgrounds
Circus Circus KOA.. Nice, but all paved Free Wi-Fi and of course walking distance to "The Strip" Well C.C. but hey, that's on the strip. Typical KOA pricing (Expensive)
A place called Hiden Village, On bolder,, Next door to Thousand Trails (Well 2 drives down) May be out of business now.. Nice but I sometimes joke about "Clean Level Sites" (One gall had 14 layers of lynx levers under one corner of her rig) In truth, most of the sites there were level, Hers was the exception

This was nice and not too expensive
TT Las Vegas Preserve (2 doors north on Bolder from the above) What can I say I am a member Small sites, but nice staff.
Moose lodge, Half a dozen water/electric only, Members only
Main Street Casino.. Main street is a Freemont Street Casino.. IF I ever make it back to Vegas I will be spendind some more time here if it has not closed.. Here is a critique of it:
Positive: Location, Location Location.. IT is behind the california which is a Main Street casino (Main Street owns it) which puts it in walking distance of Freemont even for a somewhat mobility impaired me (Though I will admit today I am a lot less impaired, since going full time my physical condition has really improved) PRICE, like 20 a night give or take a few bucks (This was in 2006)
Negatives: Neighborhood... The Hotel (You call Main Street and ask for the hotel, you register at the hotel desk) feels the need for a security guard to walk you back to your rig at night.. Nice of them.. Not sure I need that, but hey, Who's to argue.
The other side of the back wall is.. The central Bus terminal, and a Fire Station (Sirens in the night) and though the park has "Shrunk" a bit due to some other project that may have overrun it and closed it down by now it used to extend UNDER the freeway, there is also an off ramp right there (Traffic noise)
Since my house was 2 blocks off Telegraph Road in Detroit (Traffic noise) and the primary route for fire engines (Sirens) That,,, Did not bother me at all..
By the way.. FREEMONT is a MUST see in the evening after dark.
HINT: running the A/C fan on HIGH.. Covers a lot of noise.
As I said, if I return to Vegas.. and spend more than 2 weeks, This is a MUST STOP place
Covered Wagon (On bolder near Henderson) We decided NOT to park there.
OASIS, Stayed there two days in 2006, Nicest park I saw in vegas at that time, howevre also the most expensive
Note about Hidden Village and TT-Las Vegas and for that matter Sam's and Bolder Station and Arizonia Charlies.
The bus runs past them.. So you can park the towed, forget about Vegas traffic, Hop the bus and leave the driving to Gus, or whomever the driver happens to be. Great way to beat the traffic..
And you won't be able to say "I arrived at the casino in a 20,000 cadillac and left in a 200,000 chauffer driven.... BUS.. (However you might do it the other away around)
NOTE: Many places in vegas... The parking lots are BIG and I mean BIG, it can be a half mile from car to Casino... But the bus,, Door (Well driveway of the TT preserve) to DOOR