At the risk of being controversial.
A low hours pilot without any gliding expereince is on a hiding to nothing.
They probably do not have the experience to recognise soaring conditions developing/degrading - dumping a pilot who just probably paid in excess £20 in xx knots of sink leaving them to struggle and possibly landing back inside 20 minutes instead of 4 or 5 hours later will not endear them to the customer.
The tow; A tow with an experinced pilot on the back requires as much concerntration as one with a student on the back - the only difference being the expereinced pilot isn't going to take advantage of the 150 ft of tow rope between you him to take his instructor on a guided tour of bits of the tug that you've never seen from above and below.
Engine Handling and Tight Circuits. Engine Handling is a major part of tug flying, fly by the numbers and you won't go far wrong, rushing back down too quickly leads to an expensive repair bill. How do you feel about operating tight circuits with a number of gliders around? - no place for the flying school Bomber Command circuit.
Visit some gliding sites and look at the variations in size and shape, they range from narrow strips to wide open airfields, you can find at the bottom of hills, on the tops of hills even on hillsides - you may be expected to go one of these sites with you club expeditions.
Just some of my thoughts for what their worth - ALL OUT