I agree with the others about leaving her alone. She is probably very stressed out from the change in environment so in her mind, not only is she in a new place she doesn't recognize, but some big warm thing keeps trying to get her. To her, you seem like a predator. Give her some time to get used to her surroundings. That is not only the interior of her cage, but the sights and sounds beyond it as well. Get yourself some thick leather gloves if you are worried about bites and handle her for only a few minutes at first. Handle her until she calms down. Once she calms down, put her back in her enclosure. Slowly increase the amount of time you handle her until she is familiar with the way you hold her.
I had to get my boa used to handling. It took me a while and she still flips out a bit when I first take her out but she's getting better. Don't give up on your corn. She may be pissy now but she will probably calm down if you are patient. (Though I have one corn snake that is an absolute butt! He tries to bite me every chance he gets no matter what I do.)
You can feed in the same enclosure with the aspen. I feed on aspen all the time and have never had a problem with it. If you want to feed outside the enclosure though, you could use a snake hook to move her from enclosure to feeding enclosure. (I have a ghetto snake hook. Its a hanger that I bent)