Cook bacon in a large skillet over medium heat until evenly browned. Drain, and cut into bite size pieces. Set aside. Add hamburger and onion to the skillet, and cook until no longer pink, and the onion is tender. Drain.
Stir bacon, baked beans and barbeque sauce into the ground beef, and bring to a boil. Reduce heat to medium low, and place biscuits in a single layer over the top of the mixture in a 13 x 9 baking dish. Bake @ 350 15min. or until biscuits are done and golden brown.