Grindmonster is always an option.
As suggested earlier, you can pre-grind. I used to do this for travel, would grind and pre-portion for up to a week's worth of coffee. I'd seal up food saver bags as little compartments, then just tear each open as I needed to use it (no need to vac seal, just keep it airtight). Takes very little room, too.
If pre-grinding makes you go
, I challenge you to do a blind taste test!