Wonder if anyone can suggest site/sites to look for bounty campaigns?
I think you should look at this one
https://bitcointalk.org/index.php?topic=2691564.540Their bounty allocation is impressive plus their project is a good one and I'll join them when my campaign ends.
When you look at the bounty section you'll see a wide choices of campaigns and it's hard to choose what's you think is the best so better be picky in choosing one.