Sharing files on router connected to internet

I’m new to Comodo CIS and have a number of questions:

  1. How can I safely share files between my two computers while each is connected to a (public) router supplying an internet connection? In other words, how should I set up the CIS firewall properly?

    Details: I’m a full time RVer and travel extensively. When within range of a campground wifi router, I simply connect to it to get internet on my two laptops. Is it safe to configure the firewall to allow file sharing between my two computers while other people may be connected to the same wifi router?

  2. If there is no safe way to do this, should I set up a peer-to-peer connection between the two whenever I want to share files? How do I set the firewalls to accomplish this safely? If I set up a “P2P” network do I need to allow incoming and outgoing requests for P2P in global rules?

  3. When NOT in range of an external wifi, I connect to the internet using my own HughesNet satellite dish and my own WPA secured wireless router. Here I assume I’m safe sharing files since nobody else can use my router. Is this a correct assumption (assuming noone can break my WPA code)?

  4. Since a connection protocol can be either IN or OUT, and each connection can have bytes in and bytes out, does that mean the IN or OUT indicates the direction the connection was INITIATED, not necessarily the direction of most of the data flow?

  5. How can I look at a list of the Trusted and Busted (Blocked) Applications I’ve selected? I haven’t found any way to do that.

  6. I’ve noticed that many routers use IP 192.168.x.x. I have my two laptops configured within that range. Am I at risk when using public wifi routers because my IP’s may be “guessable” by other users on the same router?

Sorry for all the questions, but I want to use CIS properly to protect my systems. Thanks for your help.