We have two SW CAH boys, 5 and 8,  we dose when they wake up, between 2-3 in the afternoon, and at bedtime (between 8-10).  We have not had any issues with weight, or height, or levels.  I know all kids are different but if you can "get away" with not waking up I am all for it, but I agree if my kids start having issues I will switch to the ciradian dosing,  as for now I don’t think we need to.

PS

My 8 year old just got back from a 3 night sleep away camp. He did great had fun and did not have any trouble with his meds,  he said lots of kids had to take pills.