sudo access to specific folder
Don't modify the sudoers file. It isn't necessary. I think what you mean is "is there anyway I can alter ownership and permissions so sudo isn't required?" Yes. You can modify the folder's permissions and ownership settings using Terminal. Note, you will have to use sudo to do so and the command must be run by an administrator. 

sudo chown -R $UID:staff /path/to/folder; chmod -R 755 /path/to/folder; exit


Substitute "/path/to/folder" with the proper path. The "chown" command changes ownership of the directory to you (and it's subfolders, using the -R option). The "chmod" command sets the folder's permissions to readable/executable by everyone and writable by the owner (you) only.