One more vote for home made shooting sticks. I have several of varying lengths and materials that are used for different purposes.
I don't like bipods because they are slow, heavy to carry, and often produce a "canted" scope if the ground is uneven, and they cost way too much. Shooting sticks are fast, allow for moving shots, work just fine on uneven ground, can be used as walking sticks for balance, but best of all - they're cheap. They also work just as well as a bipod for actual shooting.
I have a hunting partner, however, who would never give up his Harris Bipod for my sticks. It is a personal choice.
Go to the local building supply and find yourself some dowelling or small dimensional wood to make a set or two. Try them out and make your decision.