CSUMB Guy,
One thing you might do as part of your research into each group might include interviewing recent colonists (now full members) that have experienced the colonization/expansion process in full.
I was personally a colonist and did a lot to help ensure that charter that's hanging in our house is now there. The process for us (Sigma Nu) was a LOT different from the Pi Kappa Alpha chapter that also just recieved their charter on our campus.
An easy way to find these chapters is to go to the website and look at their chapter listings if available -- then try to contact someone from there.
Of course if you have any questions at all about Sigma Nu feel free to contact me
LHT
Kevin
MT #5
University of Central Oklahoma