No matter what the crowd level is, it is what you make of it. You need to use it to make it worth it. When we would enter a park, say MK, we would skip the first few photographers on Main St as the lines were usually long and would find the lines much shorter closer to the end, if there was not a line we would get a pic taken. If we wanted a pic closer to the beginning of Main St and had not gotten one earlier we would get one done on the way out. As there are fewer people entering the park at that time the lines for pics are shorter and even non existent. Around the parks we usually found it very easy to have our pic taken with little to no line.
Basically it boils down to, if you buy it use it as much as you can.