Option 3--I have a pistol, a backup food supply (beans), water purification tablets, 11 rounds of ammo, and I just ate a new and interesting plant the nice guy in the woods showed me.
You can never be too careful, and greeting the sleeping guy in the tree was a calculated risk that paid off well. We got bullets for the pistol, and also got to eat, so we didn't have to break into our backup food supply. We meet up with the rest of our group at our agreed upon rendezvous place in the woods.
We aren't familiar with these woods, though we will learn them. It will just take some time and experience to know what lives here, what grows here, who lives here, and what, out of all of those things, is safe and/or useful.
Because of this, and since we've eaten recently, we all decide it's best to just move on quietly when we hear the rustling in the woods. It could be a friendly person with something useful to share. It could be the nice man from the tree once more, it could be a friendly animal, or just the wind. We can't take that for granted, though. It could also be an un-friendly person, a gang, a dangerous animal, or something else we don't want to tangle with.
Because we have ammunition for the gun now, we could shoot at it, but it seems like a waste of ammo to shoot at something when we don't know what it is. That ammo should be conserved for really important situations, such as confrontations by gang members or other, similar things. I don't want to waste it here. If we were starving, it might be different.
We've all eaten, and have plenty of supplies right now. It seems best to just quietly move on, and get away from whatever it is. We'll take the next opportunity for supplies when we come across it, but this is not a risk we have any need to take right now.
As quietly as we can, we all move on into the woods, and leave the potential danger (or potential benefit) behind.