Deermanster, where do you hunt? I use a bipod almost always now. I use Cabela's Versa-pod. This bipod has a base you attach to your existing swivel screw. The bipod can be carried in your pack and taken out when you need it (My wife sewed me up a "holster" for mine that I can put on my belt). It attaches to the base in seconds.
Frankly, when I'm hunting here in PA, I don't need it that often as shots are usually less than 100 yds and I can usually find a quick rest in the woods or shoot from a sitting position. But on my western hunts, this is a valuable tool for taking those long shots you encounter there. Just think of it as hunting insurance. I can't imagine spending a couple grand on a hunt and then blowing a shot at a trophy animal because I didn't pay $50 for a bipod.
As far as the model, That is something you will have to decide on. Luckily, the friend that I hunt with also has a Versa-pod. His is the prone model and mine is the one used for sitting. So if need be, whoever is doing the shooting can put the bipod on that meets the situation.