It takes a village
For home games, it's not too difficult, since the stadium is next to the school. We'll have about 20 Pit Bulls and 20 parent volunteers at those games. The Pit Bulls handle moving non-instrument equipment, water, snacks, and generally any other "grunt" work. The parent volunteers handle things more directly involving the kids (i.e. chaperones). With 700+ kids in the stands, the band directors need more eyes and ears.
For away games and contests, we have more Pit Bulls and volunteers. There are two parent volunteers on each of the 15-16 buses, and 30 or so Pit Bulls. Up to this year, we've used 4 27-foot trucks to carry instruments and props, plus a 10-foot truck for water, snacks, plume cases, and other miscellaneous stuff. We should have 2 new semi trailers starting this year. We also send a couple of advance scouts early in the day to wherever we are going. They work with the facility to block off space for all of the buses and truck unloading, and to rope off the band area in the stands before the Allen fan crowd arrives. They direct the bus and truck caravan in and out, so we avoid having 20+ vehicle drivers trying to guess where to go.