That really sucks you couldn't find anyone - I had the same problem earlier this year when the Canadian ran. I was all lined up with maps and plans when my friend backed out and then I couldn't find anyone.
I tried for a couple days on the forums to no avail - the opportunity was so rare that I packed up and went anyway. I had a good time camping and scouting, and caught the rare perfect flow for boating, but didn't see any other boaters.
It'd be nice to build a group of NM boaters willing to try for last minute opportunistic runs on our local perennial streams - it's hard to get people at last minute and no-one can predict these rivers more than a few days ahead of a possible trip.