I used my new rucksack this morning to carry all my P2 gear into the New Forest. I went on recommendations from a poster on Facebook who recommended the Lowepro Vertex 300 AW. I went for the bag as its designed for photographers. The bag is shower proof with sealed zips and a rain proof cover. http://store.lowepro.com/backpacks/vertex-300-aw Its able to hold my Phantom 2 with gimbal and Gopro fitted. 6 Flight batteries, the Tx, my Blackpearl monitor and sun shade, two 3 cell batteries to power the monitor, all my antennas and my Macbook pro. You can also fix a tripod to the side of the bag. Its all a snug fit and the quad is well protected and does not move. Its a substantial rucksack and very comfortable to wear. Please note though its not big enough to get any clothes and essentials in for an extended trip. The rucksack has two long panels on the front each of which can hold 2 P2 batteries quite securely. There are lots of pockets for memory cards etc as well.