how many players can be in shared tent?
As I know even 1 CH may share a tent with others, so party limit doesn't affect it.
So, the range of "Tag" is 5 hexes.
It means 92 hexes can be filled in the range within one person and 5 hexes range in all directions.
So I think a tent can be shared with 93 players.
Edit: Actually it's 10 hexes... so.. well I think all players which are online can have 1 shared tent.