I haven't done late low water, but I have done Mar-April early low water.
I don't know that I'd head over and run it at low water when everything else is running, but if I were in the area, I'd make a run just to see it. Drove past last week when we were driving back from Riggins (1100cfs). It looks like it would be very bony in a raft, but could be a lot of fun in a kayak or ducky.
I don't think you'll see 1280 again unless it rains.