Hey I had a GPS phone too (two of them in fact), but I found the little flip notebook list of directions very handy - you can have it in your pocket and look at it without stopping easily. My phone wouldn't have lasted the journey - your GPS might.
Finally, good luck getting even a GPS signal in the Manifold Valley if you go there. It's the non-urban canyoning effect in action :)
Use whatever methods are available to you - it's a long way and you should try and make it as easy on yourself as possible.
Hey I had a GPS phone too (two of them in fact), but I found the little flip notebook list of directions very handy - you can have it in your pocket and look at it without stopping easily. My phone wouldn't have lasted the journey - your GPS might.
Finally, good luck getting even a GPS signal in the Manifold Valley if you go there. It's the non-urban canyoning effect in action :)
Use whatever methods are available to you - it's a long way and you should try and make it as easy on yourself as possible.