At my club range, We have drills set up in about a dozen stations. Pretty much all involve movement while shooting, so our approach to brass collection is to cover the range in peastone and try to keep it meticulously clean. Leaf blower is deployed before every session. Brass lands where it may but is fairly easy to find on top of peastone. We ban 22lr because no one picks it up, and it becomes like chaff when you are seeking out the centerfire stuff.
That said, I've been thinking about making some simple pvc frames that would hold window screen. Maybe 6 feet square. Place these strategically near likely shooting positions so the brass would hit the screen "fence" and fall to a known position. The challenge is locating them such that the shooter doesn't run thru them when moving to next target.
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