So, here are the results:
Overall, I placed 1,264 out of 2,348 marathoners. Out of my age group, I placed 175 out of 249. My 10k time was 51:38 (average of 8:21minutes per mile), my half marathon time was 1:49:41 (average of 8:22 minutes per mile), my 20 mile time was 2:59:23 (average of 8:59 minutes per mile), and my final time was 4:12:47 (average of 9:39 minutes per mile).
My only real goal was to finish the race, and I did that, so I feel just fine about the time. As you can tell by the numbers, our pace pretty much took a nose-dive during the last 5 or so miles, and we were okay with that. By that point, we weren't so concerned with setting any records. : )