Thanks Joe Ed and progolferv1 for the replies.
Joe Ed. The trout truck usually arrives around 11 am. Sometimes I have seen it there between 9a and 10a or between 11a and 12:30pm . It all depends on when the truck leaves the hatchery form San Marcus,traffic conditions,etc.
Side Note: The best time to fish is the day after the stocking!
Just my two cents.