[Moku203]

I'll throw my two cents in here.

I get wanting to have 1 on 1 RP, as I do it myself from time to time. but when you create a camp on the overworld, if it's in a fairly noticeable location, you can expect people to randomly wander in. these are adventurers for the most part. 

I think the best thing to do would be to simply handle it ICly if people do tend to wander in. at the end of the day this is a roleplaying game, and locking others out of roleplaying with you is fairly counter intuitive.