Thanks so much for your input, everyone -- you're the best!
So here's what I'm considering putting in my mini fishing kit so far:
* 50' line, braided, wound onto a hand reel made from either a small, flat kite reel or a modified plastic bottle.
* A variety of sharp hooks, perhaps including a few trebles
* A couple of small bobbers
* split shot sinkers
* swivels
* some soft plastic lures, preferably bright yellow
...plus a bunch of tips and local information that I intend to memorize.
Anything vital I'm leaving out?