just for perspective,
i went as a volunteer with Brian, one of the river rangers, a couple years ago for the final campsite eval/pickup tires and trash run. we drove from globe at noon, into gleason flats to launch for a 3 night run to the bridge.
it was running 208 cfs at chrysotile.
it was the first week of may. i was running on of their 13' maravia spyders, as light as light could be. no tents, chair, stove, beer, kitchen, etc. just repair kit, 1st aid kit, day use size toilet, fire pan/grill, sleeping bag, low/no prep food and a five gallon bucket of ice in one cooler and water.
i can't tell you how many times i've been done the salt before that but if you would have asked me if it was doable at that level beforehand, i would have said no. obviously i was wrong.
black rock, lower coral, the maze and corkscrew - those were the ones. quartzite was nothing to report.
there was a lot of bumping and grinding, a lot of sticking the nose of the boat on a rock and using it to pivot off of to make a move to the extreme left or right. that might seem dangerous but everything at that water level was like moving in slow motion.
sorry that doesn't answer your question about kayak/IK but i would take my IK down , at near that level, in that weather (gorgeous may) but i'm gettin' old and don't get along with the cold so well any more.