Ken, I got your email but I thought I'd post my response here on the off chance that someone else might be interested in a great introductory paddle route in Wabakimi Canoe Country.
To access Allan Water Bridge and the put-in, the cheapest way to the put-in is by train. The VIA train comes by
Armstrong at 9:17 a.m (EST) arrives Allan Water at 9:26 (CT) if you're coming from the east
Savant Lake at 8:14 gets to Allan Water Bridge at 8:46 if you're coming from the west
Our trip report -
Wabakimi: Paddling To the Center of the Universe [Click on the title to access!]
The trip report has more info on current VIA Rail dates and times; they are different than the old ones in our report.
It also has links to all the downloadable Fed. Govt topo maps you would need. The maps are free courtesy the Government of Canada! The map that gnatwest mentions is an overview map of the entire park and is great for planning but you need more specific detail for your trip.
The report also has a link to
Ken Kokanie's annotated map set of the exact trip you are thinking of.
We did the longer version of the trip you describe in late Aug-early Sept 2010. We did it in ten days with one storm day off the water. Given that we tend to be a bit driven on our trips, I would suggest more time - maybe 12 to 14 days - to do what we did. Also, if you guys are going to do some fishing, then you'll appreciate a slower pace.
Your shorter route, the one that heads back via Lower Wabakimi Lake, is the better choice for what I would guess will just be your first trip to a canoe tripping paradise you'll be returning to. Next August we're going back for our fifth time since that first one ten years ago!
Other than the length of the trip, your other worry was the rapids. If you choose the shorter option, only the Allan Water has rapids you need to worry about. Otherwise, you'll be paddling across lakes and paddling up the Caribou River.
Some rapids are quite benign and I am sure your crew will get a bit of an adrenaline rush as they canoe down. Those that can't be run can be easily portaged around. The portages are all fairly short and the route is used enough to ensure that the trails are in pretty good shape. Some prep for the portages - like having no more than three or four bags per canoe so that everything fits into those bags and you don't have a lot of stray pieces of gear all over the place - will make sure they go by even faster.
The route will take you past Brennan Falls; you may want to make this one of your rest days/fishing days. It is a scenic little slice of Wabakimi.
One note about the end of your trip - instead of paddling down Caribou Lake (big water and not fun when windy), come down through Little Caribou Lake. Kokanie's map makes use of this quieter route.

Wabakimi Clem, a myccr forum member, can arrange a shuttle for you. He had our car parked at the end of Caribou Lake for the day of our arrival. It is a six-kilometer ride back to Armstrong and some restaurant food!
Nothing like planting the seeds for your next trip in December! You have picked a nice introduction to Wabakimi Canoe Country.