When is the scout team formed. I know it will be done when prep for games start but what about fall practice to establish 2 deep.
At least on our team the 2-deep stood out pretty readily in individual and position group drills. The guys who looked good in drills, took coaching, made plays, whipped their man, were physically ready, etc. would go with the two deep when practice divided into offensive and defensive sessions. Truthfully if you have any depth at all you have a pretty good idea from last year and from off season training who is going to play.
Occasionally a guy would be tearing it up on the scout team and get promoted to the 2-deep, or get promoted off the scout team to replace an injured player in the 2-deep, or get taken from one side of the ball to the other to be given a look and make sure he was at his best position, or just to try a good athlete at a position of need.
The fun thing was that from time to time our DC would let a second team D guy play on the scout team offense! When I was a freshman I got to play tailback one day (I had been a running back up to my sophmore year in HS) and it was fun as hell. Only had one good run but still recall clearly making 1 big cut in the hole into a gap that opened like Moses parting the Red Sea. DC was PISSED. He sat up on a tower made of scaffolding behind the scout offense and chewed Redman every practice. He was funny as hell, and would kick your *** 6-ways to Sunday but was universally loved. He had flashcards with formations & plays for the offense to run and it was cool to see how he prepared us to line up, where to shade, rules for different plays (e.g. sprint out away offside backer automatically blitzes, which was devastating).
Sometimes you'd get a super energetic kid who would run all over the place on the scout offense and make the D chase him all over the place, which was hated by the D (position drills were done first and were extremely tiring). So people would amp it up a notch in terms of hitting on those kids who were making them run. Pretty funny sometimes.