I can't imagine two weeks of nothing but portaging. LOL
If you dehydrate your own food, that would logically be the best way to go. You're going to be carrying it around a lot.
I don't think there is any requirement to move every day, when it comes to the backpacking trails in Algonquin. What you would do with your time for more than one day without a canoe, I have no idea.
You have the Backpacking Map?
http://store.algonquinpark.on.ca/cgi/algonquinpark/00023.html
There are some backpacking trip reports linked to here on AA, under the "Trails" tab, on the left side "interior".
Can you really spend two weeks backpacking in Algonquin? Would this involve hiking all 3 trails?
http://www.algonquinpark.on.ca/mustrails/backpack.html
As for bugs, it depends on which ones bother you the most. For me, it's the blackflies. I swell up something fierce when I've been chewed by them. And the deerflies...argh, painful.
Headnets? For the entire time you're hiking, I would imagine that would be rather tiresome.
But if you go early enough, before the bugs come out, it's really kinda neat. You can see a lot farther, because there are no leaves on trees or shrubbery to block your view. Lots more little streams are more easily discovered.
Barbara