I am from north of you near Lebanon. I don't do all classical, but do follow some of the suggestions in the WTM. How old are your dc? Mine are 15dd, 13 ds, 11 ds, 9 ds, 2ds.
To answer about the convention: The convention early, early bird pricing ended Jan 1, but the early bird goes until Feb. 1. I got $40 for family before Jan 1, I think family goes to $45-50 until Feb. 1. I am not sure about individual. It is a great convention. I really think the teen track is great also, if you have older kids.