If the weight feels easy for that day you can increase it by 5%.
If after finishing the first prep cycle and you felt it was too easy/hard you can switch the the large/small load prep cycle 2. Continue the cycles straight through until the comp day. Set new PR's, have a few days off, then start over with new PR's. No deloads are needed. They are built into the program (alternation of light, medium, and hard days). Keep that in mind when one day feels easy and you're tempted to increase the weight.