jarata1 wrote:
I did the winterization on my travel trailer with the anti -freeze.One question I have is when I was running water out the faucets before the color turned pink wouldn't that first bit of water sit n the gray water tank and freeze
It might but shouldn't matter as long as its just a little.  The very last thing I do in the process is to dump extra antifreeze in all of my traps (sink and shower) and put a gallon down the toilet.  I'm not so much worried about freezing in the waste tanks but in the traps and the valves at the waste tank drains.  I like to leave my tanks a little wet anyway this works for all purposes.  
I use a little more antifreeze then absolutely necessary that way but its not that much and it simple and works...