A few members get into Fairchild for free through a reciprocal admission policy with their local horticultural society. The American Horticultural Society has a list of reciprocal admissions. A 90 mile exclusion was added to the list in 2014, so a society can exclude reciprocal admissions if reciprocal society is less than 90 miles away.
See:
http://www.ahs.org/gardening-programs/rap/find/statebystate/Alabama-LouisianaFairchild enforces this 90 mile exclusion.
Flamingo Gardens - 90 mile exclusion enforced
Jacksonville Arboretum & Gardens - enforced
McKee Botanical - enforced
Bonnet House was removed from the reciprocal list.
I am currently a member of Mounts (West Palm Beach). Mounts is less than 90 miles from Fairchild, Flamingo Gardens, and McKee. The 90 mile exclusion removes a significant benefit of being a Mount's member.
The law of unintended consequences... some people in Florida might join a Canadian horticultural society, so they don't have to worry about the 90 mile exclusion issue in Florida.