That would be good! Or you could go a few days beforehand, get to know them, make yourself a part of their community, tell them you're a strange cousin from the city if any of them ask why you look funny. This will lull them into a false sense security and then you can grab them!
See, you can tell that I spent most of my teenage-hood trying to find ways of catching annoyingly stupid chickens that don't want to move from one pen to another. I could write a BOOk on catching various farm animals haha.