In reply to TobyA:
This. It's lighter option and separate into different areas of the bag.
I still use few dry bags, one for over than 50 years old camera (it's not waterproof at all and film can get ruined easily), one for survival kit and first aid kit and another one for sleeping bag with liner and thermal clothing (I usually sleep with them, so it's always dry).
Oh, and the bivi bag I use comes with waterproof bag too.
P.s. I have never had problems with poles being attached to rucksack under the rain cover. I use Berghaus Freeflow Pro 40 rucksack with internal cover. What about buying a little bit bigger cover (most of them have adjustable volume) if the one you have does not work well?
P.P.s. Rubber tips for poles might be a solution, too. Or even something DIY would work too. Like blue tack maybe, just to cover the tip.
Post edited at 10:36