Just got an email from a prospective camp parent asking if his 7 year old and 9 year old would be in the same group. We generally group kids by age, so in this case, the kids would be together on the bus, and from time-to time during the camp day, but in general they'd be grouped with other kids their age.
However, we understand sometimes friends and sibling want to be together, even if they're a couple years apart. No problem whatsoever! There's a place on your camp enrollment form to tell us which friends your camper would like to be with, and we'll make sure we follow your directions :)