Cutting out unwanted source video

I do a lot of events, and have to keep the camera rolling all the time.  The end result can be hours of footage with only moments of usable video.

I want to reduce the overall load/space usage etc by cropping to what I need.

I can't see a way to do this in premiere without re-encoding, and a lot of tools out there seem fairly amatuer.  I tried lossslesscut which didn't keep my audio, and I don't really want to go to ffmpeg on command line.

Is there some way to take the in to out points of a source clip and export as a new non re-encoded clip?