I would suggest breaking it up into a couple of trips. Northern Ontario is certainly within your driving time allocation. Have a look at the Steel Loop and the Marshall Lake Loop, both of which are well documented on this site. If you take time to sniff the flowers and do some fishing, each trip could take you around ten days. If you travel fast, six to seven days each, and then you could throw in another trip, or extend the Marshall loop. Neither of these are maintained routes at the moment, so you could expect some challenges.