Lot of variables to consider but my general rule of thumb is one, don't try and race the thermals. You get pegged down for some reason and the temp heats up, then up goes your scent and off goes your elk.
Second is keep elevation whenever possible. Your ability to reposition is better, your ability to back out is better, your surveillance of an area is better, and shot opportunities are usually better when above your animal. They call it death from above for a reason. I'd plan a route to go up and around them. Good odds they are going to bed up in the firs at the head of the basin. That is where I would make my play.
If the cows are being lazy I may also try and put on a stalk, though stalks on feeding animals doesn't usually work well. If I was hunting with Coach, I would like our odds. We double team elk pretty well
