Yeah watch out for those Bosch daredevil bits! The screw on the front sucks the bit in so fast that it will load up with wood pulp and get stuck. In a long blind hole it seems you have to stop every 1-2" or so, put the drill in reverse, and pull all the debris back out of the hole. I didn't learn this fast enough on a recent log-play-structure project, and I got a 3/4" bosch bit anchored firmly into a big walnut log. Had to ruin it to get it back out. Also, they are very hard on drills due to this aggressiveness. It caused me to let the smoke out of the motor in my old dewalt 18v. Still works, but made it easier to finally buy the brushless li-ion 20v kit.
You'd better set up an assembly line under a drill press to do 120 holes. I am now getting things prepared to build my own 16' long by 10' wide bridge project. I'm using salvaged 2x6 decking that I will double up. three telephone poles for the main beams, so 3 big holes per doubled 2x6. At 16 feet long, thats ~33 rows of decking, or 99 holes I need to drill. Yep, gonna do it on the drill press in the shop ahead of time, for sure!