@getupgonow just think about what you realistically need. If nothing else, cereal bars, water, roomy waterproof (because, UK), change of underwear and socks, torch, useful telephone numbers, pack of baby wipes and toothbrush, little first aid kit, sanpro, bag for rubbish. A map of local area and, if possible, a compass - quick Northern Hemisphere tip: all satellite dishes point south. Or, if you have a watch and it's daytime: point the hour hand at the sun, look at where the 12 is, exactly halfway between those two lines points south. Blows kids' minds when you show them.