I didn't find it any more difficult to do for a trip with 10 people than I normally do for trips with just two of us. The trip with 10 people was during a very busy time. I had no issues getting everything we wanted for both LLMP and LLSP each day. It was a trip with 10 park days. Some people in the group were staying offsite so I booked the entire group together three days in advance of day one.