What level showing do you do? Personally I wouldn't do more than 1 show per weekend - I don't know if you do, but the way you phrased it sounds like you sometimes do. I would lay off the showing for the winter, its not just being at the show that takes time, its getting ready, to and from and after work like washing etc. Then you would have the weekends for Patch and homework.
I'm also deciding whether to keep Misty in or out this winter along with college and social stuff.