You’ll find that most clubs will limit tow heights at busy times, especially if you have lift available. A reasonable tow height enables the glider to safely connect with lift. Unusually high tows should be limited to times you don’t have a line of waiting gliders - five to six tows an hour is reasonable for a single tow plane. I’d have something to say if the glider ahead of me on the line took a 45 minute tow!

Mike