Shadowman, I'm a little confused by your post - Our team weren't engaged by any hostiles at all so far, and where we are is suspiciously quiet, rather than anyone showing up at all. I'm not really a fan of players introducing elements into a scene without asking either - it can really throw things off, and I believe I even mention it in the game rules too. 
I actually had a really bad experience with that in an RP I ran, and it nearly derailed the plot, so I'm very set against it as a result. 

In the meantime, post is incoming from me