SULLIVANS FOODS 124 Backbone Rd. E. Princeton, IL 61356 815-879-7351 f SM-PR2162119 Picnic Season is HERE! Stop in for your one stop shop to collect everything you need! SULLIVANS FOODS 124 Backbone Rd . E. Princeton , IL 61356 815-879-7351 f SM - PR2162119 Picnic Season is HERE ! Stop in for your one stop shop to collect everything you need !