For *any* planned longer trips with highway or rural road cruising, you'll want to drive in Normal until the battery charge drops to about 2/3, then switch to Save for the rest of the drive. When you arrive you can sneak around in EV (or Normal) mode in your destination area, and still hopefully have a nice 1/4 - 1/2 charge (for the return trip, if there's no charging overnight, like you said).
Anyway, that's how I'd do it. Main thing is Save is the best setting for long highway drives, and you don't want to leave the battery dead (always nice to have a little charge for in-town driving).
Anyway, that's how I'd do it. Main thing is Save is the best setting for long highway drives, and you don't want to leave the battery dead (always nice to have a little charge for in-town driving).