Brad,
This is a very late reply, but I just saw this thread. One thing you can't garden without is a soil test. You can send in unlimited soil samples to NCState at no cost! I sent in 105 samples last Friday from my trials and production at Plant Delights Nursery. This spring, I sent in some samples from my own property. I had the same blossom end rot on my tomatoes and peppers that you were describing...which know to blossom end rot (a calcium deficiency caused by lack of calcium and/or incosistant moisture). My soil test showed that I had good pH, and low calcium and sulphur. So to maintain pH while adding calcium I added gypsum (calcium sulphate). It sounds like you're on point with adding organic matter. Your soil test will give a CEC reading, which is influenced by organic matter--this measures the soil's ability to hold and transmit nutrients, and can be a good indicator of the microbial health of the soil. Also, mulch your veggies--last year's leaves work well. Mulching keeps soil moisture and temperature more consistent. Let me know if I can help answer any more questions!
Jeremy
I wasn't born here, but I got here as fast as I could