I'd hoped with the second round of antibiotics I'd be good to go, but I needed a few more days. Race conditions were a little warm (low-70s and humid) but I don't think it was a factor. I hit the first 2 miles on target (5:17, 5:19) but I started coughing after that, and it was a long death to the finish from there.
So it goes. Looking on the bright side I dropped most of the dad weight from last year (high of 160 to 145 on race day), so it sets me up well for a good year of training. From here my goal is to get up to 80+ mpw through the summer and be ready for a good half when cool weather rolls around again.