The maps aren't allowed to be private, sorry Taboo. Mainly for reasons in the sense that the members of your group will have to separately download and import the files into the right place in Neverending Forest. However, if you do create a map for your group that would like to be placed inside of Neverending Forest- then go right ahead! It will be public, but you can just as easily message Softie and Overseer the details. Such as whether or not you want any prey to be spawning in there, or if you'd like the portal to your map to be placed in a specific location.
R.I.P Poppy (2001 - 2015) A kind, loving jack russell who won the hearts of many and always there to look after those she loved.