When it comes to small planes, weight matters. Don't be surprised when your contact emails you for all passenger weights, and when the pilot organizes seating by weights. (You don't want the three biggest people on the right side, for instance.) Similarly, don't expect to bring two weeks of stuff for a weekend, and definitely mention if you're planning on bringing golf clubs or skis. If they don't fit, check out ShipSticks or LuggageForward, which sends your equipment beforehand for a relatively small fee.
An affinity charter is slightly different in that, although all of the passengers are affiliated with a specific business, group or organization, each pays his own air fare. The passengers might sports or music fans traveling to a special event, or a bunch of friends going on vacation. With this type of charter, none of the seats can be sold to members of public.
After your initial enquiry you will be assigned a personal charter expert who will send you a selection of quotes for you to choose from. Each quote will have a clear breakdown of aircrafts and airports and reasons they have been selected for you. Should you wish to go ahead they will then book the aircraft and send you all the flight details including directions to the terminal and any other important information. They will be your first point of call for any further enquiries you may have up to the flight and, if possible, they will meet you at the terminal. From your initial quote you will be able to contact your account manager 24/7 (if on holiday you will be assigned another account manager to cover) so you can call from wherever, whenever you like.