With regards to sound, if, like mine your camcorder does not have an external mic socket then one option would be to buy a 15 quid Minidisc recorder from ebay and then either:
use a 3.5mm to 3.5mm cable (plugging into a 3.5mm to 1/4" jack) for a 4 seater
or
get a 1/4" jack splitter, use one for your headset and one for your minidisc recorder - for a 2 seater
Thank you for posting the camcorder suction mount! Will run that by my instructor.
IF, for any reason your school doesn't like the whole idea of suction mounts, then you could do one of those 2 people + instructor trial lessons, where one fly one way and one fly the return leg. You can bribe them to be cameraman/woman for the day
