Sorry to sound negative but I agree with others who've posted. Have done both in my time and it's like this:
Glider towing - The only reason I ever got to do it as a young sprog (as a non Silver C holder, but with some gliding experience) was that the gliding club were hiring our aeroplane and we set the rules as to who flew it. But, I required a formal BGA checkout by a BGA Tug Pilot examiner. You need to know the ideal places where the miserable bugger being towed wants to go, so you either need to be a mind reader, or have some gliding knowledge (Silver C) and common sense. BUT if you're a doddery old fool who's over 60 years old, have very little powered flying experience or tailwheel time but you do have a Silver C, then you'll have no problem...
Parachute dropping - Again, para clubs require 'some experience'. Not necessarily parachuting experience, but the experience that comes with making your own decisions and having a bit of time under your belt (so as not to have your decisions swayed by the aforementioned miserable gits down the back). You'll need to have the ability to quickly convert onto type if you're not current and pass a written exam & flight test with a BPA examiner. If you add flying within CAS into the equation, and a complex aeroplane type, the workload goes up rapidly. You need to get to the point of drop efficiently and at correct height, correct speed etc, 'deliver the goods' and back down again ready for the next drop without enjoying the view too much or cooking the engine(s)..
But both can be rewarding from a flying point of view. I still do it for fun and looking down on England from FL120 as idiots plummet back to the DZ below you, only to then try and catch them up still gives me a buzz after all these years.
Have fun
