CG hooks on tow do not create a problem for competent pilots. It is only
necessary to fly the towed glider, as in close formation flying, without
depending on the tow hook to do a lot of the work for you. Of course, very
short tow ropes can make any tow difficult. Both my own glider, a Phoebus
A-1, and the DG-101 I frequently fly in my club, have only CG hooks. With
reasonable tow-rope length I have never found CG hooks to present any
problems. But, do keep the trim full down on take-off.

Ed