I've just discovered this. My rucksack is 45 litres and it's full, plus I have my wellies (just in case!), sleeping bag, and also a bag of healthy snacks because I've been losing a bit of weight and don't want it to totally be undone. Oh, and a smaller bag for the daytime that currently has a few bits in it. I need to cut it down I think because right now space is gonna be an issue in my mate's car. Approx 12 hours til I leave!!!!!!
Edit: healthy snacks are now in my day bag, so I only have 3 things really, as my wellies will be coming out of their carrier bag tomorrow and being shoved in the boot! It's gonna be a HUGE pain carrying all the food, bags, drink etc from car park to campsite! Fortunately we left the tents with mates who are there tonight!