Scott at Patriot Trees
We use this company to take down trees, very reasonable, but not sure if he just does just take downs. If you just need some trees limbed up you can try Chris at AmazingScapes at 770-616-7678 (I think he has a Hometalk profile)
Here's Chris' Hometalk profile, Cheryl: http://www.hometalk.com/5204512e8e
There's a "Request a Quote" link on the left side of his page.
Acorn in Cumming does a great job, but not sure if they will travel out to Dacula area. Depending on height and closeness to home/structures you could possibly just get a local landscaper (with references of course!!!!) to take them down. Make sure they have insurance!!!!
Thank you Donna and Yair S. I have contacted them