Mixed in with the other documentation on the DragonFly website is a “how to build a release” explanation.  I use it every time there’s a new DragonFly version.  If you were wanting to build a DragonFly ISO/IMG with changes or different preinstalled dports, I’ve added some notes about what’s relevant for non-release building.

We used to have “GUI” releases of DragonFly which were based on the nrelease process installing pkgsrc packages and adding some configuration files.  It doesn’t happen now mostly because nobody has had the time to reconfigure for dports; if you were looking for a project this weekend, may I suggest…?