I would agree that a good bipod or a rucksack makes a pretty solid platform to shoot off of.
Problem is, it don't always work.
A number of places I've hunted, grass and/or sage brush pretty much ixnayed the idea of using a backpack, unless you stand it up on the frame, at which point I think a good set shooting sticks would still work just as well. Bipod... I've got one of those super-tall Harris models... pretty much sits in a drawer collecting dust. Kind of a PITA to manipulate.
Biggest thing for using the shooting sticks... practice. Take your .22 LR to the range and play around some. You aren't going to get match winning accuracy by any stretch, but they do come in hand when the grass is too tall for prone and you don't want to shoot regular Sitting w/ a sling. W/ a Rem Model 7 and some Stoney Point Steady-Stix one thing that helped me was to hold the sticks right at the crossing, and use a couple fingers to capture the rifle barrel/stock down into the 'V' even more securely, and pull back into my shoulder. Seemed to help, anyway.
YMMV,
Monte