The worst towing experiences I've had has been during aero retrieves.
Once the tugs (I've seen this behind an L-19 and a Pawnee) reached
cruising altitude, it became extremely difficult to stay behind them.
I asked them to slow down (went from 85 to 65 kt), got into low tow,
slipped and even pulled on some spoiler, but my LS8 (unballasted) was
a handful in roll and pitch. Once on a turbulent blue day I
deliberately released 25 miles before I had final glide, preferring
the excitement of finding a means of staying up rather than continuing
on tow.

-John