I currently have a two day reservation that ends at 12:30am on a Saturday. There's a chance that I need the car two extra days. What's the best way to handle this? 1. Change the reservation to add two days now, then (if needed) return the car early 2. Book a second reservation that starts 30 mins after I drop off the first car. Cancel it if no longer needed. 3. Leave 2-day reservation as is, then call and have reservation extended if need arises. Option 1 probably means that Hertz will charge me for four days if I use only two? Option 2 has the downside that I need to trade cars, but my hotel is near the airport drop-off location anyway, so not that bad. Is it predictable what rate I will get with option 3 for the two additional days?