We have thousands of maps in our retail store, and our favorite designs and formats are the Trails Illustrated versions produced by National Geographic. While not as detailed in the contours and other topography features as the 1:24000 USGS quadrangle maps, these are much better for most hikers and backpackers as generally we are following a designated trail.
The scale varies on these by area, but often in the 1:75,000 range. But trails and features of importance to hikers and backpackers are usually much better on these than on the more zoomed-in USGS maps.
We're in Arizona, so naturally we have more AZ NatGeo TI maps than for other areas, but give us enough lead time and we can get any of the roughly 250 that NatGeo makes. Just let us know if what you're looking for isn't on the dropdown list.
Couple with one of our GPS rental units for maximum navigation accuracy. Tip - set the gps coordinate format to "UTM", as all these maps include that as an option and once you get the hang of it, is the easiest way to measure distance on a map. And see this article for more detailed information on using a gps in the backcountry. We also have a few books about navigating in the backcountry GPS Made Easy and Wilderness Navigation.
The maps we carry on hand include the following, and are selectable to buy as an add-on to anything else here on our site via the dropdown above. To see the detailed coverage area for each one, the link will take you to NatGeo's detailed page for each map. Also see 100 Classic Hikes in Arizona Guide Book for some of our favorite trails out here in the West.