MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
For a DSLR, couple of lenses, charger, cleaning kit etc.
Ideally waterproof and with a good level of bash protection.
Bonus points for under £50!
For carrying round with you?
If you are car/canoe/not carrying, then a rigid box one would be best.
I use a second hand lowe alpine soft & padded bag, and a dry bag.
I've got an older version of [url= http://store.lowepro.com/sling-bags/slingshot-102-aw ]this[/url]. It's pretty good, I'm just a very amateur photographer mind, nice part about it is that you can easily slide it round and get to the camera/lenses without keep taking the pack off. Decent padding and a weather cover. My kit lives in there permanently - DSLR with a stock lens, 70-300 lens, room for another smaller one, spare batteries, charger, filters, etc etc.
As above, if you're paddling or something then pop it into a dry bag.