Derren said:
So the druid can walk freely "near" the dragon and it notices nothing?
Not to mention that the druid doesn't know where the dragon is.
Could someone calculate how long it would take the druid to search the 1 day flight radius of an adult black dragon until he is near it?
The druid isn't looking for the dragon. He's looking for the dragon's
lair. With a horde to watch over, a dragon isn't going to be able to do the "sleep in a different place every night" trick the druid can. It may take the druid days, even weeks, to find that lair in his swamp. But once he does, he's good to start his personal war.
From your last post:
But using Tree Stride, he can move up to 6 miles in any direction from his confrotation with the dragon. Per jump.
I apologize. This was my mistake. In my previous post I meant per casting of the spell, but I goofed and wrote per jump, which as you correctly pointed out, is wrong. 3000ft. per jump (assuming the correct tree, which neither of us seem to care to do the research on.

) and 6 miles in total for the spell.
Last time I checked the Hiding skill was used for hiding.
Actually, you're right. The druid would add his Hide skill for the actual hiding
on top of his Survival skill, for how well he manages to camoflage his campsite.
Yes, the dragon has to get lucky. As the druid has to be lucky to find the dragon. Only the dragon has much more time than the druid.
No, that's just it, he
doesn't. All the time is on the druid's side. The dragon won't even know he's being hunted until
after the druid has already found his lair (which as I said could take days or weeks). Once that happens, the dragon can try to find the druid (nearly impossible) each day, and whenever he comes back to his lair--he gets attacked by the druid.
Or the tactic to send giand crocodiles after the dragon. Except grappling they have no real way to seriously harm the dragon.
You don't seem to understand. They don't
have to "seriously" harm the dragon. They just need to do 20 points of damage to him. He'll heal 19 points overnight, and be down 1 the next day. When the crocodiles attack him again. Eventually (time is on the druid's side) the dragon will die, slowly, by taking a little bit more damage each day than he can heal.
This isn't a matter of a single encounter. In that case you'd be right. This is a matter of one encounter -- every day -- until the dragon is dead, without the dragon having any means to stop the attacking, other than leaving.
As hide is not a class skil for druids, it wouldn't work that good. A campfire might also give the druid away. (Yes, of course the druid doesn't need campfires, why should he. He can eat his goodberries he miracously got from somewhere.
As I pointed out, the hardest part for the dragon will be finding the campsite in that 12 square mile area. After that, slightly difficult, will be beating the druid's Hide + Survival (for disguising a campsite) rolls to actually see him. And then, of course, the dragon still has to
kill the druid before he escapes. Because if he escapes, the dragon is screwed
again.
As for the counter tactic:
The dragon destroys all trees near a location.
As someone else pointed out, the dragon could do this, but then the swamp wouldn't be a good place to live anymore. So the dragon would eventually leave to find a living swamp, and the druid would start using his powers to restore the area. The net result is still a victory for the druid: he got the dragon out of his swamp.
The dragon casts silent image to create a dragon in this area.
The real dragon hides in a lake. When the druid emerges and casts a spell at the illusion he has a big problem.
Where is this lake? And how is the dragon going to spot the wildshaped druid when the lightning bolts start raining down from the sky? Or really, only one lightning bolt, since the 10th-level druid's Will Save versus the dragon's caster level of 3 means he's got a very, very good chance of saving versus the illusion after the first bolt. At which point (if the true dragon has revealed itself) the next bolt strikes true. Or, he simply flees and remembers the trick so he can circumvent it the next day.