I mentioned this in a previous post on scheduling, but Brooks, it might be worth looking into Diamond Scheduler. It's $100 for a year, but can help you put together different custom (and complicated) schedules. I took the plunge and bought it to create custom schedules for my college universe, since it was simply too daunting to replace numbers in a huge CSV without inevitably getting it wrong.
Also, I don't know what the folks on the OOTP forum do for custom schedules, but they've managed to get a system down for scheduling large leagues with many games and scenarios:
https://forums.ootpdevelopments.com/for ... php?f=3632I definitely get that it's a challenge to get this right for complex leagues, but I really feel it's one of the most important aspects of a college football sim.