Hi Laura:
That is quite a challenge! To keep the ideal time you have in mind, you may have to find another officiant

But here's a solution that might work for you instead...
Grab that 1pm time slot for the wedding, which would end your reception around 6pm or so. Guests can then go home at this reasonable hour for a Sunday OR they can join you as you extend the celebration to INCLUDE the evening activities at that fall festival as your 'after-party.' You'll all just head out after the reception -- maybe getting changed first, as many couples do for their afterparty -- to enjoy the fun activities and sights, sounds, snacks at the festival together with all of your friends and family. This way, you get the JOP you want, the full wedding plans exactly as you'd have them at the later time [a 1pm wedding is often identical to evening wedding receptions] and all the perks of that fall festival!
Let me know if this works, or if you'd like other ideas...