Here's what I'd recommend doing in this case:
1) Become an ATA member, so that you can...
2) Download the GPS track data for (most) trail passages from their website
3) Purchase National Geographic TOPO! Arizona state series
4) Import the GPS track data (GPX file format) into TOPO!
5) Print the relevant map data on 8.5" x 11" paper at 40% scale, which will yield an efficiently large coverage (fewest # of pages to carry) with acceptably small typeset
In case you're unfamiliar with TOPO!, this program uses actual USGS 7.5' map data for the entire state, displayed seamlessly, and with overlays that the user provides (such as the route line of the AZ Trail, as outlined above). So in the field, you get the best of both worlds: you'd carry just the map data you need for the hike, and you'd have the trail superimposed on those maps, which you can then cross-reference with the guidebook and, of course, reality in the field.
Edit: Just to be clear, this is the approach that most AZ Trail thru-hikers are using. It's essentially what I did for my thru-hike in 2004. You don't need to be carrying entire 7.5' quad maps - more coverage than necessary, unwieldy, heavy, and none of them will show the AZ Trail route line. TOPO! allows you to print custom maps that cover just the area of detail you're concerned with - that is, the trail and its immediate surroundings. The TOPO! map data is based on the 7.5' quads, but what you carry into the field ends up being a much more efficient and pertinent set of maps.
Many of these advantages are also common to other mapping software such as DeLorme Topo USA. However NatGeo TOPO! is one of the few that offers actual USGS 7.5' (1:24000) base map data, which is the most field-worthy, and arguably the only data worth hauling along on a trail as navigationally challenging as the Arizona Trail. (As a supplement only, the DeLorme Arizona atlas/gazetteer can be useful for its road detail and for the big picture. You might consider scanning and reducing the pertinent pages and printing on 8.5 x 11.)