I have read all the forum entries around this area but I still can't quite nail the problem.
This is a tennis club, and we have senior, junior, infant, coach, non-playing, veteran etc membership plans at different prices and all renew on the same day. We want to set up a family membership so that there is one payment covering two adults and as many children as there are in the family.
I have set up all the group configuration, so that someone can sign up for the family membership and add children. The problem is I still need to know what type of individual in the group each is, eg two adults, one male one female, both seniors, plus one Infant plus one Junior. How do I know which plan each individual family member would have bought if they were individuals? Do you think I should use categories, or another custom field, or am I missing a trick here? (Note if I use categories or custom fields there is always a chance the value may be out of alignment with the plan they purchased.