I myself don't go a lot in the winter because I can't keep a horse legged up in the winter. I don't have an indoor arena to ride in, and it's dark when I get off of work. Plus the snow makes it tricky to have a safe ride and the thick winter coat (I don't blanket or clip) make it loooong to cool down.
But if I boarded somewhere with an indoor arena, and kept the horse legged up, absolutely!
It never hurts to get more experience hauling, especially if barrels is a new concept to the horse. However, if they are not in the greatest physical condition, don't expect to push them hard physically, at the race (of course).
If nothing else, do exhibitions and there's some easy practice!
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.