Buy your own snap caps. Take them with you. If a gun store has issues with dry firing then the snap caps solve the issue.
Personally, I have been buying most everything over the internet because it is not available locally.
One day, I shall come back. Yes, I shall come back. Until then, there must be no regrets, no tears, no anxieties. Just go forward in all your beliefs and prove to me that I am not mistaken in mine.