Backroad map books (Ontario) is where it's at imo. Its pricey but it does the job and a whole lot more. Boat launches, old logging, mining roads, rail ways, WMUs, snow/atv trails and way more.
I have the Montanna 600 because it functions as both my hand held and navigator while driving. Once I'm off city/highways I enable BRMs. Just returned from a trip up north camping/ bear hunting, well off the beaten path. It came in handy more than once, including a short night track.
iPhone apps are nice and sometimes fun. You really want to kill the batteries when your out and about or in the middle of nowhere for more than a .5 day or day?
A place a used to hunt deer. The dotted lines are decades old logging roads, it includes old reads that are so overgrown, without it, you'd never know there was once a road there.
http://jbenphotography.ca/img/s10/v115/p227587813.jpg
Driving into camp last week.
http://jbenphotography.ca/img/s12/v183/p1238901715.jpg
A screen shot of the area and a couple tracks. Zoomed in but trust me, every abandoned mining/log road (even those overgrown), and more is there.
http://jbenphotography.ca/img/s7/v166/p1238901725.jpg