Bipod or sandbag, shooting rest?

I'm a mediocre shooter, but still love the sport. 

I was shooting off bags until I got my Accu-tac. I nearly always use it when shooting off my backyard bench--along with a bag or my fist in back. I find I do less fiddling and more shooting by using the bipod. 

I have a Stinger, but have only used it for mounting scopes, etc. I will definitely give it a try on the bench. Thanks!