JMHO, after you stay at another RV park on Boulder hwy you'll never miss Sam's Town. I lived in So Ca for years and went to Vegas a lot. Their RV park was going downhill. We stayed there a lot. Then one time they were filled and we went to another RV park. Would never go back. Sam's town area on Boulder Hwy is a fairly high crime area. They were really cutting down on security for the RV park. That is why the office closed early except for Friday nights. Employees were afraid to work the desk after dark.
Arizona Charlies or the RV park on Nellis south of Boulder are much better parks with better security. You will still be able to drive over to Sam's town and stand in their crowded buffet line. You should have seen those lines when there were jobs in Vegas. :B . Or go to the Cannery and enjoy a much better buffet or enjoy a nice quiet buffet at Az Charlies with almost no line and good service. (minimal food selection). Some good steak dinners further south on Boulder hwy.
If KOA updates the RV park and puts in better security it will be a better park.