My issue with this is that, if you can so easily make it to your main camp.....then why even bother with having a Mini-camp? Perhaps if your Main camp had a significantly higher Supply Cost, and/or if there were more locations from which you could not fast travel to your main camp, then that would be sufficient to alleviate my concerns.
My impression from reading the forum is that some like the minicamps because they like having the camp reflect where they are.
I like going to the main camp because it has pets and followers. I don’t think it should have any extra restrictions or extra costs to go there.