I do not mow for people. However, I have a guy that does mow. He uses a 12HP Snapper with the Hi-Vac. Going at a very slow speed with the deck at about 3.5-4", does a great job of picking up the acorns. I do set the irrigation to go off early in the day so mowing with wet soil keep the dirt from being sucked up also. Generally very little grass is mowed since most southern grasses have gone dormant or quit growing. My people are older and raking is out of the question for them and him. He charges for an extra mowing. I'm also thinking that if those things were run through a chipper/shredder that they would make great compost. I know they are very acidic but this soil is so alakaline (pH above 7.5) might be returned to the ground. In SC we have acorns in the fall and leaves in the spring to pick up--a two-fold attack. It would be nice that both would happen at the same time as the northern guys. We have a variety of water oak that drops leaves in the late fall and puts on new leaves in the spring but most are live oaks and drop leaves in the spring when the new growth begins.