I received my nature trekker as per this thread and was a bit astonished at the size of it
Bit big for little excursions but will keep my orion trekker for those. The nature Trek Definately holds my canon 400d, 70-300mm, 10-22mm, 24-70mm and my 100mm macro. Also room for another lens, hopefully the 400mm next
also lots of room for spare lens covers, hood, bats,cards etc. As Mike says, comes with a day pack which should easily hold picnic nosh and a light waterproof coat. All this with weatherproof cover