Sleepaway Camp IV was never made. They had begun to film but because of differences/arguments between ownership rights it was put on hold... and kept on hold ... and eventually dumped and never made.
Last year they released a special DVD pack with Sleepaway Camp III if you bought this, you got the special bonus of the actual footage they did film on IV before the project was dropped... It's only 34 minutes long ..
As far as Return to Sleepaway Camp I believe they were going to do it.. but who knows... rumors, rumors...
http://www.angelfire.com/retro/offic...campfront.html