I'm no expert but I went to a wedding like that. What they did was do pictures with the group and everyone (we were close to the lake) they also stopped at their favorite bar/restaurant (they were close with everyone there) had a few drinks, some snacks for kids or adults if already hungry and also did a trolley ride around town then straight to the place of reception. Just try and fill in time in between is what they did, with fun stuff of course.