Typhoon Trail to Nellis.
The southerly route is due to it being WINTER...have you tried getting receivers airborne in snow and -20 degree temps in Newfie this time of year??
Actually yes. Taking the participants to Red Flag always seemed to happen around new year time and I have vivid memories of crewing into aircraft in the hangar at Goose before being towed out to start. There was, for reasons I never understood a complete reluctance back then to use the Southern Route. Penny pinching I suspect.