I've never put dry hops in a bag. Both pellet and whole leaf go right in the carboy. Pellets tend to settle and you can siphon from above. Whole leaf tend to float and you can siphon from below. I sometimes do what others with whole leaf and put some sort of straining cloth on the racking cane but that usually turns out to be a hassle and clogs.
Primary: Honey Kolsch Take 2
Bottled: Belgian Gold