There is a large truck stop about 4 miles west of the turnpike in Miami on Tamiami Trail (s.w. 8 st) it is located at the entrance to the Everglades and you can easily return back to the turnpike. DADE CORNERS MARKET PLACE, 17696 SW 8TH ST, MIAMI, FL, 33194
27 is not bad but you do spend a lot of time on the south end stoping at red lights through several small cities (south bay, clewiston).