I don't come often, and pretty much exclusively on weekends. This Sam's Club doesn't seem any more or less crowded than others I've been to. They always have plenty of boxes for packaging up your purchases, and the bathrooms are frequently cleaned.
To get the best selection of free samples, visit on the 1-2 weekends before a major cooking event like Thanksgiving, summer holiday barbecues, or go this Saturday for Super Bowl snacks.