HERE IT IS... THE DEFINITIVE ANSWER TO MY QUESTION, COMING STRAIGHT FROM AN E-MAIL RESPONSE FROM SUPT ROBIN REILLY!

DRUM ROLL, PLEASE:
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"You can pick up the permits at any of the stations in the office……although once in a while they are all taken.   But you are correct that every station operates in the same fashion…..Nym Lake as well.    The stations don’t all close at the same time for example Prairie Portage is open until the third week in September.    Most close at the end of August or early September."
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Looks like Jim J nailed this one down pretty well.

I am grateful to Robin for his extremely prompt response to my e-mail.  Now I'm hoping there are at least a few forms left in the box by the time I get there at the very end of the month!

Thanks to all who contributed to this thread.

Jimbo   8-)