BOTH!! I have the 9-13" Harris Swivel bipods with notched legs and Pod-Locks on them on my varmint/predator rifles. I also carry my shooting sticks with on every predator calling stand and also carry them when out prairie dog shooting.
When I am able to find a spot where I can go prone, my bipod is used. If I walk into a spot where I need to sit to be able to see, then my homemade shooting sticks are deployed.
I use fiberglass electric fencing rods and cut them off just a wee bit. These fiberglass rods already have a sharpened end.
I use 3/8" rubber fuel line hose on the tops to rest the rifle stock in and use three rubber castration bands for the hinging device on the sticks I use most often. Here's a photo of the hinge area and the rubber hose before I spray painted the hose with Krylon Khaki camo paint. I paint the fiberglass rods to camoflage them and also to keep the fiberglass from flaking off and getting into my hands for those times I don't wear gloves.
I also built another set of sticks using the same type of rods, but used a small bolt for the hinging area, a thin rubber faucet washer between the two rods, steel washers on the outside of each rod, and two nuts to lock the bolt in place. I used the same 3/8" rubber fuel line, but cut it into two pieces. This set of sticks and the rubber hose were also painted with Krylon Khaki camo paint
Here's the sticks holding up my Remington 700 in .17 Remington: