Any place with a tram would be my recommendation. YES, the tram can be crazy busy. Mainly in the mornings when everybody is going to SEMA and when everybody is leaving SEMA at 5PM. So either hop on a little early or late and you'll be fine. They do pack you on like sardines but there is a new tram every 7 minutes. Plan ahead a bit and you'll be good.
I'm at the Flamingo for what it's worth. Close, tram access, and only have to go downstairs for the Lateral-G party!