Let's see... Jaxon wanted Crow to meet him in three days (which lines up with the current night), so I was going to have him drop by the thieves' camp to give his first report. I could see Jaxon wanting to know how the patrol ends up going, so he would tell him to meet again at the end of the trip (probably closer to Myrefall). Maybe Gavin would double back from the knights' camp once the mission is over and follow him then? Gavin is already super suspicious, but maybe something during their time in Wheldrake would tip him off a little more. For example, Crow is only going to eat a small portion of his food for supper because he knows it's laced with a sedative, so maybe Gavin could find where he dumped the rest of it and suspect that he had done something to cause them all to sleep in late the next morning? If not that, then I'm sure there could be something else to clue him in that something's off ^^
I was thinking the same thing, actually. It would be pretty devastating for the knights to go back to their camp and find it wrecked from an attack from Younis. That might also make Gavin angrier and provoke him to tail Crow the same night.