Need some ideas...

So, a while back, one of the guys on the executive board at the ranch we stay at during the summer brought to my attention a really cool painting party idea, where you have this big mural with a background already painted, but you have silhouetted people/objects/animals for others to paint. He really wants me to do it, and Memorial Day weekend, 4th of July weekend, and Labor Day weekend, always bring in loads of people and we have lots of events. The only thing is, I have no idea what to paint for these three events. I was thinking for one a few horses running through a pretty desert/pasture scene much like where the ranch is located. Keep in mind, I do want to stick with a Western/horse/hunting country theme. Anyway, thanks!