I just put the following chips in my HDS 10 and here’s what I found.
LakeMaster Woods/Rainy Edition LPWRC03-08
Everything was high def up to about Nestor Falls. Everything North and Northwest of that lost all countor and high def.
I then put in LakeMaster Woods/Rainy Insight 1.0 (beleive this was the last that was made for Lowrance units but could be wrong with that statement)
I checked north of Nestor Falls and found both 2D and shaded high def 1 foot contours way north to Soiux Narrows and north and NW of there.
I beleive some of the ares you are referning to are Islands such as Calvert, Patsy, Fergus, Timber, Annie, High Rock to mention just a few and all these areas are contoured very nice and in high def.
May want to see if anyone has newer version than my 08’s and that are not insight 1.0 and have them maybe look.
Guessing a couple of the higher end man stores might be able to anwser your question in regards to exact ship you are inquiring about.Fish-lectronics is one that comes to mind or Thorne Bros.
Hope this helps.
Damn, looking at my Lowrance and all that wonderful water just made me that much more anxious for Soft water season