Hi Bryce,
I wanted to let you know that Janne has posted some code for hiding activities and resources per groups, in case it might be of some help:
http://moodle.org/mod/forum/discuss.php?d=25023
General developer forum
Per-Group Course Customization
Гэтае абмеркаваньне было заблакавана, таму вы болей ня можаце адказваць на яго.