Lol, those would be some mighty resistors! Of course, you meant 3.3K Ohm.
Yes, you will need a pair for each of the secondary busses you are using. A pair for the main bus is also good (it often works without pull-ups on the main bus because the Arduino uses it's internal pull-up resistors, but those are much weaker than the recommended values).
These resistors can be low power, eg. 1/4 Watt or 1/8 Watt