This Summer (August), my friend and I are setting out on a 12 day backpacking expedition to Iceland. We are going to be hiking around the majority of Iceland, mainly wild camping but 2-3 nights will be spent in a hostel. However, although experienced 'base' campers and short overnight hikers (as we are leaders at a scout troop) we are fairly unexperienced at backpacking. So on that basis I'm asking for your help and advice on gear and food. The main area I need advice in is how much and what clothing to bring and whether or not I should bring food (from the UK) or buy it there, but any help or gear advice would be hugely appreciated.

Thank you
MrScout