Here's a quick breakdown:
Group Captain: Sign up as a group captain if you plan on having a group of friends joining you on the trip. Take the lead, invite your friends to join your team. This keeps everyone organized and let's us know you all want to stay together. * pro tip - Groups must have a minimum of 4 people to secure your own condo.
Group Player: Sign up as a group player if you are joing a group that already exists, i.e. your friend is a captain and already createded a group.
Individual: Sign up as an individual if you are planning to come alone. We will place you in a condo with other individuals or groups that need more people.