Unusual vocalization heard near Sandy witnessed in Clackamas County, Oregon

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Before I go any further, I'd like to emphasize that I am not sure that I actually heard a bigfoot sound. I am mainly putting it on here because I have thought about it in depth (that's why the delay in reporting), and the only thing in my memory that has any resemblance at all to what I've heard is the past audio recordings of bigfoot (although what I heard had better audio!). I still wonder if this was a bigfoot, how or why it would have been near a town, but I have no other explanations. I was in Sandy, Oregon with my family during the weekend of July 21-23, 2000. We were staying at the Sandy Inn, which is just west of the main part of town. It was hard to sleep the night of the 21st; it was very humid and some thunderstorms did move through about midnight or so. I was up several times during the night; either to shut the window, open the window, turn on the air conditioning, etc. I got up once around 3 or so in the morning on the 22nd after the storms passed. I was sticking my head ...