Colorado’s first Buc-ee’s — a Texas-based convenience store and gas station chain known for its barbecue, store-brand snacks and happy beaver logo — was greeted in March with fanfare and long lines in Johnstown on Interstate 25 about 50 miles north of Denver. A proposal to build the state’s second Buc-ee’s along I-25 near Palmer Lake, south of Denver in El Paso County, has prompted a different reaction.