i booked the entire vacation for a group of 10, 18 months ago. I will say the best decision I made was to do dinners split up with 5 & 5. It gave a nice break and we just met up right after dinner, it was a nice recharge. Also, if a few people don’t want to do something, no problem, just tell them you will meet up with them in 30/60 minutes or whatever works. We also would say “next up is space mountain we will meet everyone there at our 2pm fast pass window”. Trying to stay together navigating the busy parks was a nightmare so just pick your spot to meet at instead.