For many years I have navigated Audaxes with nothing more than a printed route sheet attached to the handlebars on a takeaway container lid, held on with three zip ties (for the lid) and two elastic bands and a folded polypocket (for the route sheet).
I've used Streetview to check each and every junction to make sure I know where they are, and when I've got lost, just used the maps app on my phone together with the route sheet to work out where I went wrong and what I need to do to get back on route again. Remember that town/village names in bold are ones that you go through, otherwise just directions on signposts.
For the distances, as long as you know what the junction looks like, they are only a guide, i.e. if it says 0.4km, it is coming up pretty soon, 10km and I've got good while before I have to start worrying.