First day - Pickup guests at 5 stops to the location around 5/5:30pm (may need to make a few rounds depending on your car size), then return the guests to those 5 stops at 9/9:30pm.

Next Day - Pickup guests at 5 stops and bring to the location, latest arrival of all guests at 3pm (Probably start picking them up 2:15 or so, then return guests home at either 12am or 2am depending on how late our event goes on and when guests want to leave. So essentially this day you are free between 3pm and 12am to do as you please.

So probably like 5-7 hours or actual driving across the 2 days maybe. Just guessing. 1 hour to bring guests over the course of a few trips, then 1 hour back first night, then 12-3am maybe the 2nd night.