azalea, you have a way of explaining things so that it makes sense.  Not a common trait.
   Following DD's advice, I did go ahead and buy the Garmin map.  This map doesn't come on a disk--either chip or download, and the new download technique from Garmin downloads it directly onto your GPS.  Initially, nothing goes on your computer except Garmin's "Connect" software.  Your GPS shows on "My Computer" as a drive, and like any other drive, you can view the filenames, sizes, etc., that are on your GPS.  Once your install is done, then you can download Garmin's "Basecamp" utility for free, and then use it to look at the map on your computer (similar to Memory Map with different file formats), add your waypoints and stuff into the Basecamp display, and then load that onto your GPS.  I'm still figuring out how to get the waypoints and other data into BaseCamp easily.
   It's not a bad system, but I did make one mistake, I think, and all of you who might be in the market for Garmin's Quetico maps can profit from my mistake.  My mistake was buying their "Inland Lakes - Boundary Waters" map, instead of just buying their Canada topo or their Central Canada topo.  The problem with the map I bought is that it has too much data on it and it clutters up the screen, and the biggest offender is that they have loaded onto their map most if not all the legacy campsite information--and as far as I can tell, there is no way to get off of that map all those sites that all of you have found not to really represent usable campsites.
   The campsites are represented on the map by little pup tent icons, and I will have to go through all of them and overlay another icon (exclamation point or something) onto those that the PCD shows are really usable campsites.  Or overlay an "X" or something over those that are not usable.
   I also have to figure out how the portage information on the PCD works--I think I'm comfortable now with the campsite data, but I really don't have a clue at this point how to figure out the GPS end-points of the portages from the PCD.  Can anyone steer me to one of the archived threads for information on this--I couldn't find it.
   And let me say it one more time briefly and clearly, in case you missed it above:  for those with access to the PCD, if you are in the market for a commercial Garmin map covering Quetico and if your primary interest is travel/camping by canoe, get one of their regular topo maps of the area; do not get their "Inland Lakes - Boundary Waters" map:  it's too cluttered with some irrelevant Legacy Forest data that I don't think can be removed.  If some of those pup-tent icons really can be removed, I sure would like to know about it.