My six campers are in this picture, working in their writing notebooks! (My daughter looks like she's covering her nose/face, but I think she's just pushing up her glasses.)
What I learned - give the older kids more independent writing time, use that time to work with younger kids (conference, writing activity, guided reading, etc.)
2 of the girls had to go out of town for family matter, so I only have 4 for days 2 and 3. No problem! Gives me time to try out the age grouping.