Bunk houses will vary in quality as well. For example, (I run mostly in the DLS region) the HST is brand new and as a consequence the bunk house is top notch. Others are not quite as spiffy. Bunk Houses, fortunately are few and far between. Just remember that in a bunk house, outside of the room one sleeps in, there is no such thing as privacy and carry an extra pair of shorts and tee shirt so you won't have to get completely dressed if you need to arise during your sleep period for...ahem...personal matters.
I take a bag good for 6 days and pack a crock pot and soup,crackers and dry cereal. There are Wal Mart's everywhere, so it's a good place to shop and replenish supplies as needed. Try and pack a little extra cash as one never knows whether toll roads will be encountered. Learn how to get a Comcheck if needed, and don't be afraid to ask. Otherwise, the company can suck your wallet dry just floating their operating expenses. Try to minimize your personal expenses or the cash will disappear as quickly.