As an alternative, if you’re cellphone is compatible, the mobile Google Maps app is downloadable. It triangulates your position based on cell tower signals and is very usable. It’ll provide directions and full search abilities. Plus it’s free.
If you want to rent them separately from a car, airgorilla has them for $40 for a three-day minimum with an additional $9 a day days 4–7 and $5.50 a day each day after seven.
Thanks for the advice, folks. I decided to go ahead and buy one, since for the time we’ll be gone, the cost of renting would probably exceed a new device. And I’m sure it’ll be useful later on.
@santheo: If you wouldn’t mind, get back to us with the model you bought and your satisfaction or dissatisfaction with it. I’ve been thinking about buying one myself.