Lobby groups,,, not much. Nothing listed in the 2017 Alaska Lobbyists directory (updated Feb 2017)
Anti pebble web sites : http://www.stoppebblemine.org/. Its dated (lists Parnell as governor) and the sites top 3 ways to stop the mine - Write a letter, eat salmon and tell your friends...kinda sad really.
http://www.savebristolbay.org a little more organized but dose not seem to have a lot of support. Backed by Trout unlimited and a bunch of Bristol Bay companies...go figure. Its more up to date, its latest form letter addresses EPA-R10-OW-2017-0369.
All in All its quiet on the northern front. There will be more opposition in the future for sure. Winters get cold here so a seething hatred for pebble creates much needed warmth.