The only teams that totally miss the playoffs are the 5th and 8th place teams.
Teams that are eliminated will have a Saturday scrimmage scheduled automatically, and they will be able to schedule a Thursday scrimmage.
The regular season ends next Saturday (July 26). The 6th and 7th place teams play a best of 3 series (Tuesday July 29, Saturday August 2, Tuesday August 5, if necessary) to determine which relegates. Nobody relegates from D.IV in the USA, but the playoff still happens.
The conference semifinals (one game) are played on Tuesday July 29.
Teams that are out of the playoffs will have a scrimmage scheduled for them on Saturday August 2. But the teams that finish 5th and 8th will miss a game on Tuesday July 29.
The conference final (one game is played on Saturday August 2). After it is played, there may only be two teams still in the playoffs, unless there is a 3rd game in the relegation playoff, so most teams will miss a game on Tuesday August 5, and only have two games that week.
The conference final (best of 3) is played on Tuesday August 5, Saturday August 9, and if necessary, Sunday August 10. This is the only Sunday game of the season.
All the other teams will have a scrimmage on Saturday August 9.
Nobody plays on Tuesday August 12. This is the start of the new season, the draft is held and BB is getting things ready for the regular season.
So there are between 0 and 3 training weeks that teams won't have 3 games. Most will have two weeks.
With two games, you can either use team training (stamina or FT) which doesn't require playing time. Or you can simply concentrate on training fewer players. So without a league game, you might be able to train your youngest players. Game shape resets at the start of the season, so it doesn't matter that some players don't play during this period.
The next regular season starts on Saturday August 16 and Tuesday August 19. The cup starts on Thursday August 21. So you are back to a regular 3 game schedule, though the cup might be distruptive to your training if you play your best players in all 3 games.