Lee, you could do a drop test check for mites (a little tray that slides into the hive and sits on the bottom board). You know you have them, it's a matter of how many. A few is not a huge problem. You could certainly plan to medicate in the fall, but with a new hive, you won't be taking any honey off anyway, I suppose, if you do a check and have a large number, you could medicate now.