It Is ILLEGAL To Go Onto Land That Has Been Open To Everyone Since Humans First Set Foot Here.
Agenda 21 isn't some dystopian future that will happen if we do nothing. it is our dystopian present time that's happening now because we do nothing. Most Americans have never heard of it and if they have they think it's a conspiracy theory.
If you're someone who likes to fish, or hunt, or camp, or 4x4, or hike, or climb, or watch birds, or swim in a lake, or sit by a stream, or be free, than this fight is yours too. don't wait until you're seeing the blockades, they're doing many other things that you can fight against.
Most likely, your elected officials are not in control of anything so you'll have to find the unelected board or committee that is running things and your best bet is to just completely shut them down. Block every single project that they have going on & prevent them from using any public funds or federal grants.