Run out of room on my Mac side, can I repartition more memory back from bootcamp?

Don't argue, just buy WinClone or Paragon CampTuneX.

Both have demo mode I believe. WinClone is under new management and support with new features. CamptuneX was the only real way to do non-destructive resize.

In any event, use the mac backup and windows system restore image backup so you have those - never work without a safety net, not worth it.

Generally 80GB is fine for Windows partition.

It is never good for any OS to get below 20% free space / 20GB minimum or it will have errors or problems functioning.

PS: Memory = RAM, not drive storage space

RAM is usually 4-8GB or even 16GB.

Disk drive partitions and storage are of course 100GB to 4TB.

http://www.paragon-software.com/home/camptune/ $19.95

Everyone needs duplicate backup sets, 1.5TB WD Green drive and $35 for case.

A copy of Carbon Copy Cloner shareware.

So you bought BOTH WinClone and CampTuneX?