It always good to contact your representitives with whatever method you prefer. I would like to add this. E-mail is the probably the weakest way to contact. A phone call is good but the single, most effective way(minus in person) is by written letter, stamp and all.
I wouldn't waste your time with any member of the DNR. At this point, only the legislation is listening. This is why it is SO important to go to Madison on the 15th