When hunting out of a blind, I've killed a lot of deer using the Primos Trigger Stick - Bipod. I've carried it some and I just bought a Trigger Stick in a monopod but haven't used it hiking yet but looks promising.
I made a bipod out of carbon shafts with aluminum arrow sections glued to an end with shock cord running through it to make a tent pole type setup. Surgical tubing at the intersection creates the pivot. The weight is uber light and it works really well.
I use my trekking poles though. I can't leave them and they are amazing when the leashes are crossed.