This schedule might work:

6-8: Writing time for DG

8-8:15: Outdoor karate time
8:15-8:45: Breakfast
8:45-9: Clean up
9-9:30 or 9:45 Free play
9:45-10: Snack
10-11:30: Two 45-minute structured activities (art, patterns, cooking etc) OR field trip
11:30-12: Lunch
12-12:30: Reading time
12:30-1:30 Nap, quiet time
1:30-1:45 Snack
1:45-2:30 Free play
2:30-3:30 Playground
3:30-5 Play date, unstructured play, whatever

5-6: Dinner (probably take-out)
6-9: Bedtime (writing time for DG)

If I can actually write in the mornings and evenings, this could work. Cooking and cleaning will definitely fall by the wayside for two weeks. On Tuesdays & Thursdays, I need an hour and half to visit my mother. So, things to think about...