I love, love Cottonweeds. I wish I could have gone but we were packing up our family cottage before the storm hit and getting home yesterday. If you sign up for their newsletter, you get emails when they have special events like this. They cosponsor a retreat in the spring, as well. I haven't been able to go yet since it's the same weekend as my guild's retreat. I've taken a class there too. They have a very comfortable classroom space.
Oh, man, I'll have to try to get there at some point!