Proper Camping Spots

I'm planning roughly a week long trip and I've been mapping out a few routes to take.



I understand that there are designated camping sights within the park, but would it be looked poorly upon if I set up a sleeping bag at the end of the day?



I'm not sure if anyone has hiked Algonquin Peak to Avalanche Lake, but looking at the maps there is a place called Caribou Pass. Would this be a suitable place to set up camp for the night?



I'm planning various routes to take so I will definitely have more questions. This right now is my main concern. If this is in the wrong forum, let me know.



Thanks in advance.