Sorry I didn't include this in the OP, I didn't know about the existence of google forms. Here is a rudimentary submission form. It collects 5 pieces of data: the mob name, the amount of time you spent camping the mob, the number of times you saw the mob, the number of common items you got and the number of rare items you got. Please feel free to fill it out whenever you do a camp. It doesn't have to be precise, but the more accurate the better! I'll periodically update the wiki with all the data I get.
Spawn Chance/Drop Chance Submission Form