Your assumption that you have to belong to a local club is mistaken. Here's a link to the requirements:
http://thecmp.org/cmp_sales/rifle_sales/eligibility-requirements/
So, even if you're not a vet or L/E, you can go to a range once as a day shooter and have the rangemaster signoff on your safe handling and shooting activity, then join the Garand Collectors Association by mail ($25). Except for getting your signature notorized and digging up proof of citizenship, you're all done. If you're over 60, the shooting activity requirement is waived.
Good luck.
Must have been reading it wrong as I’m definitely a vet and have a CCW. Also over 60 so I guess I’m just about golden...