I will post the longer story in the future, but wanted to get some general comments out quickly.
The DuChef is magnificent! We put in at the bottom end of Lac Laganiere and took out about 5 or 6 kms below the confluence with the Ash. Aventuraid ran our shuttle - took about 5 hours. We left our truck at kmpost 36 on the access road where there is a little gated lane down to a camp. However, we paddled past the spot unwittingly, and wound up finding another access spot, where an older road runs down to a meteorological station - then walked up the road and drove the truck back down. This road meets the access road at kmpost 36.
Our water level was ok to start - about 185 - and steadily fell down to 125. The rapids on the upper reaches were bony at 185. Once we hit the confluence with the Nestaocano it got better, but still pretty bony. However, it probably allowed us to shoot the RIVs a little easier. We ran or lined everything with the exception of the CVI portage - which was not a difficult portage. Most of the SIV ledges were easily lined. One of the last RIVs on the map should be a SIV or maybe SV. There is a portage trail there, but we lined it on the left, which was probably not the best idea. Campsites marked on the map are not always there. A lot of beaches have washed away, but the sand has made beaches in other places.
One thing to note that slowed us down a bit, there is a place where the river splits around an island, and looking at the map, you have a choice of going right through an RI, and then lining an SIV, or go left and have a series of IIIs and IVs to contend with. The right channel is not passable at this water level - there are a series of 50m long, riverwide stone dams with shallow pools between. You have to go left.
The difference btwn the Chef and the Mistassibi (which is my only comparison point in the region) is immense. Where the Mist is generally hemmed in by steep hills, or a moonscape of burned land, the Chef is stunning in its vistas. Its valley is wider, and constantly changes from a narrow little river to a big wide river, from cliffs to rolling hills to small mountains. Just absolutely stunning views around every bend. It does not have the endless RIs and RIIs that the Mist has, but the flat sections move pretty well with a double blade. On our worst day we knocked out 30kms of mostly flatwater in a stiff headwind (took 10hrs of paddling).
The wildlife was thick! Otters who swam along with us, beavers, moose, and bears - lots of bear sightings and many, many more tracks - no trouble though. Evidence of people is nil until the last day when you cross under the last bridge - then we saw a couple out on a date on a beach, and another couple fishing near their cabin. But that was it.
Thanks to whoever was ahead of us - someone in a green boat from the marks on the rocks - we appreciated the sawn firewood left behind. Hope your marshmallows turned out good! (we found your sticks.)
Gorgeous river - well worth the the time it takes to run it, and worth the time it takes to get there. I don't know the history behind the name, but I can just imagine them saying - "that's the river of big rocks, you can hunt there. That's the river of big water, you can hunt there. That one - that's the Chief's River - leave that one alone." It felt like a very special place.
More details and photos in time.
Here is garmin link -
https://share.garmin.com/ChristianCotzWas talking with Ben up on the Albany throughout the trip via our InReach devices - pretty cool to keep track of each other that way.
Christian