Have spent some more time playing around with the Quo mapping software designing the route for the TGO Challenge, I now know that the whole route fits on 29 A4 sheets of paper.
The Quo maps I have are at the 1:50 scale but the software allows the maps to be printed out at almost any scale. I did try printing at 1:25 which give the best detail but only allows a 7x6 km square map, which mean more pages. Printing at 1:50 gives the lease number but is nearly impossible for me to see without glasses, it would mean having to put them on to map read then take off to see where I was then going, which in a pain and in bad weather a complete hassle.
So to give me the best option of scale I can see without glasses and not have to many pages; I have gone for 1:30 scale, which gives the 29 sheets of A4, but by printing double sided is only actually 15 sheets of paper.
But I worked out a way to make this even less sheets of paper; in fact only 8 by printing them on A3 paper, I can get 4 maps to one A3 sheet.
The next step is how waterproof the printed maps will be; printing on standard paper is a no-no as one drop of water and the maps will be ruined. I know that you can buy waterproof papers (which are expensive) to print on but I'm sure that you also need to have waterproof inks to make this work properly.
I have some maps printed using a high end electrophotography machine and will do some tests to see how good they are in the wet. I don't expect them to be fully waterproof but to be better than the ones printing on a normal printer.
As I'm taking a low level route; I'm sure that having the digital print out instead of 'proper' maps will work out O.K. although I will probably get and take the Havery's Cairngorms & Lochnagar British Mountain map incase I decide to take a detour in the Cairngorms.