M wrote:
We're planning to fly into West Yellowstone airport (WYS) in a Grumman
AA-5 Traveler with stock engine. The landing and takeoff will be about
200lb under gross and we plan to take off in early morning. Densitiy
altitude is of course a major concern.

Has anyone flown to that airport in similar non TC, fix-pitch
4-seaters?

Yep, you'll have no problem.



What's the terrain like near the airport?

Wide open. Big wide valleys. Doesn't really qualify as mountain flying.



Any room for
climb-out?

More than you could ever use.