Thanks guys!
I found a few articles last night that discussed "tow/haul" -- when it is best to use it and when it simply isn't necessary. Most stated unless you are really tugging a heavy load, you are OK without engaging it when traveling flat highways. The authors also recommend using it for for downgrades as well as stop and go city traffic. My TT is really light so I don't think I will need it most of the time. Had the van out in "manual" yesterday without towing and found it pretty easy to use. I'm heading out this weekend, a couple of hours out for a show so I'll have an opportunity to see how manual works when I'm towing and what my RPM's run in 5th and then in drive and compare the two.
