Even if your "war" is just a bunch of friends playing CTF or a FFA in a house, gym, or park it's still a lot of fun. Stock, modded, or homemade...the beauty of nerf is that you have thousands of choices. Just do what you and your friends think will be the most fun and have at it!
A trip mine is a fun idea (although has been attempted) to be sure, but you really want to stay away from having a thread that says you will post pictures at a later date or that it's not ready yet...the wielders of the banhammer aren't to found of that. Just a heads up!