Curious about requiring Great Lakes diving experience. Would they accept wreck dives in the Puget Sound / Lake Crescent? My guess is that conditions would be similar.
I am also now wondering if the requirement for Great Lakes diving experience also has something to do with the differences in the way boats are operated vs the tropics, besides differences in diving conditions. Now, I only have my one boat trip to compare from, but going on what others have told me:
Great Lakes boats probably won't put a DM in the water with you, you're dealing with your own gear (of course, they'll help if you need it), and a maybe fin-on ladder. My tropical only diving friends have been really surprised there's no DM in the water with you and that you have to assemble your own gear! The fin-on ladder confused them. LOL.