Since me and my mate first started driving when we was 17 we drove all around the UK and went up to inverness in his classic Mini and i insisted on using maps. 2 years later and still use the map and pencil when it comes to journey planning, (i've turned down a GPS...or as the commoner's call it 'sat-nav' as a present many-a-time!) as good old fashioned navigation never would do you any harm and is good practice for when your airbourne i think. At least you won't be driving over a cliff as some people do
I think once I have my PPL or CPL in the bag I may however invest in a cheapo unit so that I can get some spatial awareness with regards to airspace and will stop me looking down at that damn map
