September is overseed month and many LV courses will be closed for a couple of weeks for this purpose. Complexes with more than 18 holes will alternates seeding schedules so some golf is available. You can google LV golf course overseeding schedule to find out who does what when. Not all courses need to overseed and it'll be business as usual for them. One thing to remember will be cartpath rules. After overseeding, courses are cartpath only for at least a couple of weeks after, sometimes longer. The reason for this is so the wide wheels on the powercarts won't pick up seed and transfer it elsewhere. Cartpath only is no fun in my opinion, so I would check.
Good Luck!
Ric at Joes