Those shoes only show were you have been, not were you are (that would require a cell connection).
Prepaid Android, $100 plus $40 monthly fee (no contract, prepaid) then install any one of many apps for tracking in the Google Play Store like this
one for example. After the trip, eBay the phone. Bonus, the Android is great for watching movies, checking in on your favorite Disney planning website plus a ton more. iPhone fan boys need not apply (just joking, relax Apple enthusiasts, but hey, this same solution would cost way more on iPhone).