Quite a few cachers have a Garmin Nuvi of some variety, but only use it to navigate the car from place to place. For those who weren't aware, it's a great paperless caching tool. Load as many caches as you like (to the SD Card if necessary), and include spoiler photos (not all models are capable of this). The excellent jjreds macro formats the cache data (you'll need GSAK - free - and a pocket query).

Look at these photos, using one of the cheapest models - does anyone else use the Nuvi like this?