Thanx for checkin' in...
The "no hydrant required" idea works good until you have ice. As much as I think that I should be able to limit my house fires to warmer temps, that's not the way my life usually goes (thank you, Murphy).
I do know that some of the finer points of installation limit pipe bends to the use of 45 degree max elbows. This way, if the fitting jams, is frozen, or whatever, they can cut it off and still slip a suction hose down thru the 6" PVC piping to reach the water level.
Until further notice, I see myself adding this feature to my project. If it's going to be done, now is the time.