Update: My Bartender 5 upgrade failed to install cleanly.
Deleted Bartender
Tried Hidden Bar: Did not like it
Tried ICE: Very good, very happy now
ICE: Asks for a coffee donation before download e.g. 5 USD
Creates three areas
1: Always show items
2: Show items when you hover over menu bar
3: Always hidden items
which is all I want. 
Note: It is on version 0.xx so stable but still being developed
Comprehensive set of settings to fine tune your requirements.