Power broom sounds like the way to go. We've always used backpacks to do the job. I find you have to be a bit more aggressive blowing acorns than anything else. What I mean by that is you have to get closer to the turf and right up on them to really get em moving well. It's a little bit more of a workout and you have to do more side to side movements with the hose as well. I get em in lines and work em as far as I can go until their ready to pile. Then a scoop, barrel, and rake finishes it up.