The location for a family reunion is very important. You can hold it indoors or outdoors and on your familys property or public property.
You need to make sure that the entire family or at least a majority agree with the location.
If half of your family are into extreme sports and the other half consider church exciting, it can be very hard to compromise and you may end up having to have everyone vote on a choice of different places.
A family home or something very memorable to everyone is always a good idea and doesnt require reservations or permits.
Tourist destinations are great for family reunions. This includes theme parks, beaches, resorts, or even a nice hotel with something fun nearby.
Many of these places will offer a great discount if you tell them you are setting up a family reunion there.
Disneyland for example has special packages designed for this sort of thing. The best time to visit tourist destinations is during the off season. Instead of setting up a family reunion for June, try May. There will be a lot less people there and rates may be a lot cheaper.
If you decide to rent either a park, church, or other public...