Looks like I'll be getting my stuff back.

I managed to get in touch with the girl...I do have to go and get it myself, but at this point I don't mind doing that and besides, I have a friend in that area that I was planning on visitiing anyway so I can just kill two birds with one stone when I go over there.
For the record, this girl and I never actually fought. It was more like we just lost touch, but she never called me and never would answer the phone when I called so I assumed she was mad at me over something. I dropped by her house a few times last year to get my things, but she wasn't home and I never could reach her in order to find out when she'd be there. When we spoke earlier, she said that she had intended to drop my stuff off before she moved out of town but lost her cell phone so she didn't have my number anymore. I'm so glad I "went psycho" and started asking other people, because all it took was talking to a grand total of two people--once apiece--to get the information I needed.