I've been trying to crunch fixtures together (it takes quite a bit of time putting things together to include different eventualities) and some scenarios would produce a nightmare of epic proportions if the following happened next year...
* Tyrone are involved in both the NFL1 Semi-Finals and Finals. (That potentially kills at least one date straight away unless you delve into your starred games very early.)
* Tyrone defeat Down but then lose to Monaghan in the Ulster SFC, meaning they enter the All-Ireland Qualifiers at Round 1. (If you lose to Down, you then have the date of when you would have played Monaghan free for a non-starred round before you enter the qualifiers)
* Despite the set back, Tyrone manage to reach, by skill or by luck, the All-Ireland final (the 13-day rule becomes 20 days before an All-Ireland SFC Final. Kiss goodbye to most club football until then especially if you win via the second semi-final)
* The minors also get a good run in the All-Ireland series too (doesn't necessarily affect league, but could upset club championship fixtures)
* The Ulster club championships see Tyrone drawn in at least one preliminary round (meaning your representative starts the competition two weeks early)
* You want to make sure that your county representatives have at least two weeks between winning their county title without a replay and their first game in the Ulster championship (explaining to them that they will almost certainly have to play a league game in between, not to mention that this issue often keeps cropping up like this year)
Not surprisingly the easiest path is if Tyrone don't get any further than All-Ireland Qualifier Round 4, and it's not much more difficult if they are knocked out at the Quarter Final stage. Even if the minors reach the All-Ireland final, those players are only covered in the official guide to playing in a club championship game 7 days maximum before a county game.