Timing agony

Hello - we have a dilemma with the date and timing. My partner is a teacher who teaches summer school till 6/26 so we want to get married between then and back to school prep week 8/17. The whole thing is stressful to us and he just wants to do it as early as possible. Don't worry - we are looking forward to actually being married - just not the center of attention part. The problem is that the venue we chose has specific times for ceremonies - 11-1, 2-4, or 5-7 with 2-4 being the most popular. We want to do a quick 10-15 min ceremony and then an afternoon reception between meal times with heavy h'orderves, drinks, desserts, etc because we're not into sit down, formal stuff. Our original thought was do the 2-4, say we'll be there by 1:45 (which I think we could get away with just hanging beforehand even though it's not "booked" till 2) and then ceremony 2:15-2:30 and reception 2:30-6p. Our site is booked 2-4 every Saturday in July except 7/4 though which I think is fine, but we should've sent save-the-dates a long time ago for a holiday wedding (right?!). Do we go with a holiday or pick 11-1 and do a 12:30 ceremony and 1-5ish reception? Is that too close to lunch? We could also wait till August and get a 2-4 timeslot, but my partner and I are so not good at or into this planning stuff- he is worried that his whole summer off school will be stressful.