Agreed, workflow is everything.
We provide tournament photography in the Philadelphia region for everything from week-long national level events through to weekend, or one-day regional and local tournaments. Regardless of the scale, having a preplanned approach for quickly processing the photos is critical, since we typically have around 1000 photos, per photographer, per hour.
Our primary workflow is to assign Team-ID numbers to every team, and Game-ID numbers to every game (these mean nothing to the players or their families, but are gold for us). We can use these IDs to pre-build all our galleries and indexes as needed.
Before the event, we print out a mailing label per game (using those Avery sheets with 30 labels per sheet). Each label has the Game ID, Game Time, Field Location, Assigned Photographer, Team IDs and Full Team Names. These are placed on little "change envelopes" you can get at office supply stores (little paper envelopes that are a little bigger than the stickers, but perfect for holding 1-2 memory cards).
Photographers are issued a stack of these envelopes. Read the time/location of their assigned game, make their way to the game, pop a fresh card into their camera and shoot a photo of the envelope as a "slate" at the start of the card. Once their shooting is done, card goes in the envelope. Repeat as needed for all the assigned games for the day.
Then, either on-site or after the event, the cards can be read in, using the information on the envelopes to tag all the ingested photos with key info as their read in. This is far easier and faster than sorting through photos after they have already been ingested into storage.
Hope this helps.