Hi Austin,
I'd say it's definitely that pesky neighbor's spotlight and funky tree that's hampering your imaging efforts.
It's probably a good thing to try & find out what it was exactly that caused the stray light, so you can take it into account (or better: block it!) next time you go out.
There's also a fair bit of vignetting happening (dark corners) - you might want to take some flats, so you can correct for it during processing.
jjjnettie gave some good tips (curves!) on how to get some more detail from your images. You might already know this, but keep your eye on the histogram as you play around with the curves and other tools. Make sure the levels in the histogram "hug" the left and the right (e.g. drop off just before they hit the far right and left), but never "crash into" the far left (=clipping in dark areas) or right (= clipping in light areas/overexposure).
Another great tip from jjnettie, which not just applies to forums, is scaling down your image. If your optics, tracking or seeing conditions are introducing errors/distortions in your image, scaling down will make them less noticeable. It sounds like cheating, but it isn't!
It's hard making anything meaningful from a heavily compressed JPEG, but I attached my two cents (I used nothing but StarWipe and StarBright + The GIMP only for cropping the usable part).
Keep up the good work!
Ivo