Hi Micah,
Definitely take it easy and stay in recovery mode until your body has bounced back from running the 25k. When you add something to the schedule you usually have to take something else out to stay in balance.
Doing a few easy spins, stretches, and the strength/core exercises this week and starting up again next week is a good plan. I recommend doing week 8 next week then 10, 11, 12 as planned.
Enjoy your 3-day weekend!
Coach Lynda