I think the competition rules need to be looked at.
The FA vase manages to allow next Saturday replays, and it doesn't matter what mileage is involved after the 2nd round. This was shown in the Tring Athletic Vs Biggleswade tie which was played the Saturday after yet both teams are in the same league and could have effectively played each other midweek. As it was, the replayed date was the same day they were due to face each other in the league
I believe that teams should travel no more than 150 miles round trip midweek in any round for the trophy or vase, unless mutually agreed. If leagues have to postpone games then so be it.
I appreciate the Trophy is the senior non league competition but there are still very semi pro teams in it.
The other option would be to allow teams in step 4 to either enter the trophy or vase. but I feel that would be unfair to step 5 sides. of course there is an argument that it's unfair for step 4 teams playing full time outfits as well