I plan to visit Hawaii next Easter but don't want to pay ~A$300 for a North Amercian map pack just for seven days when I only want to use it for two islands (Honolulu and Maui) for a week!
Does anyone have any sugestions as to how I may be able to get arround this problem please?
I guess this answer is just a little too obvious... Buy paper maps...! They will cost only 10 or 20 dollars or so (or use the free maps that come with the rental car) and will do the job adequately. I don't think Honolulu and Maui are so large and have such complicated road systems that you cannot drive around them without a satnav.
(On a related note, one of the stories we heard over the holiday period was people in eg. France calling the local Dutch AAA assistance desk with the complaint that their TomTom had broken, they had no idea where they were and needed help. Response from the AAA desk: find a fuel station and buy a MAP!)