This. It's one of the least fun aspects of the game: have it just fade away like a weekend skirmish where people pack their stuff and drive away unannounced, while others are guessing whether there's going to be an enemy to shoot at tomorrow. I really miss the epic finales of earlier Bergets, and wonder why and when leaving early became so commonplace? It only takes some rumors and hearsay about not having the finale, or hearing that the other guys have already packed up, and everyone starts questioning whether it makes sense to stay for Saturday.
6 hours of gametime on Saturday has IMO always been a nice opportunity to go all-out; long enough to get nice pitched battles, but not so long that you bonk out and tire completely. I'm not even touching the issue of allocating a sizable portion of yearly vacation days for Berget, and having it fizzle out before actual game-off.
If you need to pack up during the game, why not start packing during Friday evening (which traditionally has been the time to take it a bit easier in preparation for Sat morning finale), and finish up after game end?