Did you go in 2013? Next summer maybe?
I'm from central Canada, I don't know how old you have to be to be considered an older gal, but I will be 50 this year and would love to celebrate this with another riding holiday on gaited horses. I too went to Iceland, last October, and loved it. Any trip on gaited horses, I'm up for it, until I get my own gaited horse.
California sounds good.