i was planning to get a gps for my rental during our stay in kauai so that we can explore the whole island with ease. we would also get a map, but usually like the gps for extra confidence and so that i have to stop, pull over to check the map, etc. two questions: 1) will the gps even work well in kauai? not sure what the signal will be like. 2) is the island so small and with simple roads that a gps is just silly? i'm happy to hold on that extra money if it's completely unnecessary.