So if you hit the start button/ "M" it brings up a rudimentary map, it just doesnt show your exact location. Thats something I wanna finish later on, but I also wanted to have the museum have enough visual clues that a map wouldnt be entirely necessary. I'm gonna update the gift shop with better clues here soon!
Chum-wise, the freezer door near berthas dumping point was put there just incase someone went all the way there but didnt get the chum near the piranhas. That way they wouldnt have to go all the way back. So theres no difference between fish guts! Not sure if you know this but theres another creature that likes chum in the aquarium ;)
Lemme know if you have any more questions during the playthrough! Always happy to help.