For many shoppers, Costco can be a one-stop store. Customers can buy a value pack of paper towels, AirPods, a jumbo bag of frozen fruit and a mattress all in one visit (among tons of other items).

You’re planning a monumental road trip, and you’d love nothing more than to bring along your favorite canine companion to share in your adventures. Should you do it? Will your dog cause problems, make ...