Methodology for Managing AS IS / TO BE Models (Version Control, Release Control)

Being new to ARIS, I am looking for some Best Practices advice on how to manage multiple versions of models. This could be AS IS/TO BE models, models in various states of development, etc. As we are in the "learning to walk" phase, I am looking for some good ways to get started with this effort using existing tools of ARIS Business Designer/Architect without having to go out and look for additional Release Cycle Management modules. Any help would be greatly appreciated.

Thanks!