I work in this field, & just wanted to mention that in these cases, state residents don't carry any more weight than other Americans. Right or wrong, the thinking is that when an issue is deemed a federal issue, then all Americans carry equal weight in commentary. In fact if you were to send in a public comment stating that wolves are actually aliens from Mars and we therefore must give them all wreaths, it has to be given equal weight.
Because of this, the most important thing during public commentary is the number of people sharing a point. If the numbers in favor of delisting far outnumber those opposing, then there is a much better chance for that happening.