we used Bear River Merchantile. Dick and Sandy were great, and very helpful. Bowron Lake Outfitters is not longer renting canoes (verified 2 wees ago), so you are right that only leaves Beckers. Check before driving and reserve as there are less boats to go around now.
We wer not impressed by what we saw and heared about Beckers on our trip. Most of the Beckers canoes we saw had little free board left by the time they were loaded. Life jackets seemed aged and iffy (one member of our party rented from them, and refused the life jackets...paid extra to rent from BRM instead.)
We had a wonderful trip. If you need any help with other logistics, let me know, as I kept detailed notes (some here on CCR). Am available only until Sat. morning, then we are gone paddling

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Present: Slip, Slap and Slop, hide from the sun! Past: Get some colour in those cheeks! Paddle Naked!