Can .map files and mods be hidden from other players in mp?

[Hoplosternum]

I am hoping to create a mp game on the Llamaserver (if possible). The game will have a backstory, various restrictive rules & hopefully some roleplaying.

To help this along I want to create a modified map with some set unique sites and also modify the nations playing and add a few modded sites.

So the game will involve both a Mod and a Map. I know how to make the changes I want in both, but ideally I don't want the players to be able to view these during the game.

The mod won't affect Pretender design but I don't want the players to be able to see the Mod's changes if this is possible. This is because the mod will give each power some extra units options and I want this to be a surprise for their opponents - it's important for the plot of the game (no problem for the player to see and know his own extras before the game starts). Is there any way for me to be able to do this? i.e. can I get the players to hand in ordinary Pretenders for their nations in a game that uses a Mod for those nations as long as the Mod does not affect Pretender design?

I would also like to set up special sites on the map. I want most of these units to allow recruitment of National Units of races not being played as these sites will mostly be Abandoned Capitals of nations not playing. If I can hide the mod I can hide the sites details as these go in the mod. But is it possible to hide the map details. Not the map graphics of course. All players need these. But can I hide the .map file from the players? If they can look at this then they can see all start locations and the special defenders I would like to set up.

Thanks.