Five things to watch for in this weekend's Verizon IndyCar-NASCAR Camping World trucks doubleheader at Texas Motor Speedway:1. Time offThe IndyCar teams are weary, but the truckers are well-rested. IndyCar has been going non-stop since April Fool's Day, with three races leading into the month-long preparations in May for the Indianapolis 500 followed by a doubleheader Saturday and Sunday at Detroit.