If I was the TL...hell yes i'd want to know and they'd get THE BOOT. Seriously....on big trips like that, there's just SOO much that can go wrong.
Ex. High water Middle this past spring. I happened to be one of the last oarsman added to the trip....only a couple peeps new of my experience. NO WAY in hell I would have embellished and put the rest of the group in jeopardy if shit were to hit the fan. We had five experienced oarsman...a few that have been down the Middle before (it was my virgin run though). TL leading, 3 in between, me sweeping. Carnage at Velvet....all three middle rafts had problems (2 flips, 1 dumptruck). Imagine if I had lied about my skillz and not been able to make that move. Our TL would have had 3 flipped rafts (potentially), and one without an oarsman (for a short time, he actually got back in his boat pretty damn quickly)!!! Still, that would have been A LOT to deal with and the probability of losing gear would have been much higher.