Well, I did some reading, and it turns out I knew a lot less about these buddies than I thought (my first trailer with them) lol.
The good news is that I didn't blow out the rear seal, but I was definitely overpacking both bearings, like to the point of packing until excess was coming out of the sides...at least I know now. So the bearing is still packed tight, o-ring back in, and covered up. The only thing that is not in there is the spring, which I'm sure I can do without until I'm ready to repack again (?), at which point I'll just replace both buddies anyway, since they could be as old as the trailer for all I know (08). No other bearing systems have a spring loaded system that I know of, so I don't see how not having a spring in there is going to hurt me at least for the short run.