Most of us would be interested to know more about Comiket so this page is quite interesting. The map has different options and it is interesting to know about different doujin groups. However there it seems there isn't nothing to separate different activities cirles.
If you want to know where your favorite groups are, check their twitter page or at #twitcmap tag
Some translated things about the map:
１日目 2日目 3日目
Related to the different days 1st , 2nd and 3rd day.
東 East part
西 West part