I haven't been there yet but don't see any reason that it wouldn't be possible to spend a summer out there.
Friends of Wabakimi has maps, campsite and portage info and
Paddleplanner has the same info (as in:
literally the same info- I'm pretty sure most of the mapping was done by FOW regardless of who provides the maps). PP also allows you to save your route and download it.
PP also calculates travel time (in answer to your "how long will it take" question). You can change parameters such as paddling speed, single vs double portages, etc and it calculates daily travel. I'm taking that with a grain of salt as I expect portages in the lesser-traveled areas to be a bit more sketchy than, say, the BWCA.
What I've done is combine info from both FOW & PP to build my route maps for my trip this coming August. I mapped it out on Garmin's mapshare so that I'll have all of the details on the inReach and then transferred those maps to caltopo for printing in pdf format. (I prefer paper maps for navigation and the Garmin is intended to be back-up only).
I've watched quite a few YouTube videos while following along on the maps and have identified a few additional campsites and some portage info (including one portage that I will not attempt if it's raining as the footing would be poor and a fall would dump me into a deep ravine)
Another thing to consider is exit strategy in the event that you need an extraction. On the West side of the park, there's a First Nations guy named Jonah that runs shuttles and might be able to pick you up at a parking area if you can get there. He's a bit hard to reach, however.
On the East side, Clem Quenville does shuttles and can provide extraction from access points.
Within the park, extraction could be arranged through Don Elliot from
Mattice Lake Outfitters. You'd just have to coordinate which lakes his plane could land on and get yourself there. Don also provides outfitting and is willing to provide as much or as little as you need. I've found him to be very helpful in my planning and highly recommend contacting him if you need outfitting for this area.
I'll have contact info for all 3 in my inReach when I push off from the launch.
If you've not yet done it, check with FOW (and consider joining). They have several people who can provide insight into various areas of the park depending on where you're planning to go.
And, finally, remember that Crown Land surrounding the park is about 1/3 the price per day of camping within the park (if that matters).
