In the past, The Advance used to have fun with the Snowbirds who would flock south for the warm Valley winter weather. Not this year, though. With the southern border closed to Mexican shoppers (unless they fly here via the airlines), and the Canadian/U.S. border closed as well to nonessential travel, Valley businesses can use all the consumers it can find; so welcome, Snowbirds from the Midwest. According to one big RV park in Pharr, the Canadian Snowbirds amount to less than 20 percent, closer to 10 percent, of its bookings, and so far, it seems like it’s too early to ...