They are only too far if the players closer to the front won't wait up for us. I'll be very disappointed OOC if that happens. All I am asking is for some coordination so that players who want to enter the target of a crusade when it falls can do so. IIRC, we can have multiple crusading stacks converging on a target and then create a stack with all the avatars in to take the settlement. I have a vague memory OK did that in Kotr when we took Jerusalem.
Ironically, for the last two Conseils, I have been pondering an amendment to ensure that players get a chance to join crusades. But Hermant lacks the rank to propose such a thing. Here is what was in the Kotr rules, for example: