The Works, So now what are you gonna do with the can of worms you opened up here.
I ran a rattler for 13 years with an in bed aux tank. The aux would set empty for months each year. i never had a prob with water/never a WIF light. :h
Just an odd ball thought. if you fill up it will probably be summer blend. So if you take off for the great white north and it is COLD you might consider throwing in some anti gel to get you down the road until you start buying winter blend.
What part of SC are you gonna enjoy the winter in. It can get pretty nippy in the mountains.