TomT thanks for the input.
As far as Joyce Lake goes, I have camped there 5 or 6 times, each time for a couple of days. The site is XH, but it is really on the very north end of the island. The first time we were there was in '79 or '80 and there were still picnic tables and a number of cement blocks for a fireplace / kitchen area???  The story from Joe Meany at LLC was that they flew the Queen of England into that site back in the '30s or ???
The fishing for W & L & SM is generally good, but the last couple of times we have been really disappointed. I can confirm that there are "blue" walleyes in the lake. I have a couple of old Kodachrome slides somewhere of my wife catching one.
Do you or anyone have any intel on campsites on Marg?
GeneM.