Think Pelican case in a bag. I love to take my camera kayaking, mountain biking and on my motorcycle. I want a case that straps around my back and swings forward to easy access without having to take the bag off my shoulder and rest on tank (Scraches!) Currently I use a Kata DT213. Works great for this. (Many companies make similar bags which would fit this request. But I need a waterproof and somewhat shockproof bag for kayaking. Haven't taken a spill with it yet, but you never know. Currently use a Pelican 1400 for this. Works great. Problem is Pelican cannot be strapped on my back for on the bike and the Kata dropping in the water would be disasterous. Fitting into a larger bag works but not quickly accessible. Ideally a soft outer bag sling, with an insert which would be like a pelican. I started desigining one for a Kata contest a while back but never finished it.