Perhaps if you can’t remove them you can do MAJOR trimming of limbs and branches to make them less troublesome.
Often it’s better to ask anonymous questions, check out local ordinances, and work quietly WITHOUT contacting the conservation agents (who that is in your case, I don’t understand). Do you have neighbors who would complain?
Wetlands are established and governed by the US Army Corp of Engineers. How is it that this buffer zone is declared wetlands? Or is it a supposition? If you haven’t had a wetlands delineation done in this buffer, or it wasn’t done previously, then I’d consider it not done yet, and proceed quietly. I don’t see how pine trees equate to wetlands. Usually you need wetland soils, water sufficient to designate a wetland, and known wetland plants. One option might be to cut 3 trees now… and 3 more a couple years later.
Usually local zoning offices “enforce” wetland regulations when they are reviewing applications for subdivisions, or if a neighbor complains. These departments are overworked and generally do not have “officers” roaming the streets like a policeman. If you’re on a main corridor, yeah, they may see you.
Check with the forestry dept to inquire about tree cutting rules for private individuals. Don’t tell them your name. Check with your local planning to see if there are any ordinances regulating tree cutting for private individuals. Be generic and don’t tell them your name. As a layman, I’m suggesting that you don’t go looking for approval from a regulatory officer, as you’re bound to get an answer you don’t want. I hope it works out for you.