We'll be going to WDW this November, and the grandparents have decided to join my family for the trip. None of them use a mobility device, but because of all the walking we talked about renting ECVs for them while in the park. We don't want to use an outside vendor because they don't need them all the time and we want to avoid the hassle and extra time involved in transporting them to and from the park. But, I have read that because of the limited availability of in-park rentals, they're usually gone by mid-morning. They aren't early risers by any means. My family plans to be at rope drop most days. TLDR - Can I rent an ECV when I get to the park first thing in the morning and leave it there, and just hand over the keys to the grandparents when they join us later in the day?