The only actors to appear in all three films of the Dorm Daze trilogy are: James DeBello (Cliff), Tony Denman (Newmar), Jennifer Lyons (Lynne), Patrick Cavanaugh (Pete), Paul Hansen Kim (Wang), Patrick Casey (Mike) and Josh Miller (Brady).
During the campus orientation, Pete asks if anyone knows what famous campus building Eugene O'Neill died in. O'Neill did in fact die in a campus building: room 401 of Shelton Hall, a dormitory in Boston University (which had been a hotel at the time of Eugene's death).
In the very beginning of the movie, when Newmar is riding his unicycle, (as it's cutting back and forth between him and the people being photographed) you can clearly see the shadow of the camera and several crew members following him.
What are the differences between the R-Rated and Unrated Version?
The Unrated Version contains an extended shot of the two broads when his dream girl rather gets busy with Gerri, who just came in. A detailed comparison between both versions with pictures can be found here.