There aren't enough of them around Chicago yet to drive down prices IMO. The demand is huge, but I think largely due to our weather there just isn't that incentive run a truck. Guessing during the winter their business wouldn't be very good.
The prices are better when you find them outside the track, sure the track gets their cut.
I love visiting San Diego. It's one of those places that you visit and wonder why on earth we live in the Midwest and deal with winters. But all our family is here and we see them on a regular basis. Not sure how we would adjust to not seeing everyone.