And how do I find THIS place?

Hint 1 of 11:

Frog Rock is pretty nondescript.  It doesn't advertise much because there's
not much to advertise.  You won't find any souvenirs to lead you to it.

Hint 2 of 11:

There are two pretty reliable ways to find tourist traps.  What's the other
one?

Hint 3 of 11:

Since you're not going to find a souvenir, you need to find someone who will
tell you about Frog Rock (and also why you want to go there).

Hint 4 of 11:

Somebody close to bigfoots.

Hint 5 of 11:

Talk to Dougie's uncle, Shuv-Oohl.  If you can't find him, read the next
clue.

Hint 6 of 11:

Shuv-Oohl is behind one of the doors at the Mystery Vortex. (If you can't
open the doors, go to the Mystery Vortex hints.)  Shuv-Oohl will tell you HOW
to find Frog Rock, but it won't appear on your map YET.  That's right, this
is a two-part puzzle--you'll have to do something else as well to find Frog
Rock.

Hint 7 of 11:

Think about how you could use the information Shuv-Oohl gave you. If you
could find the two landmarks he mentioned, you could also find Frog Rock.

Hint 8 of 11:

Try looking at this puzzle from another POINT-OF-VIEW.

Hint 9 of 11:

If only you could just LOOK OUT across the fruited plain.

Hint 10 of 11:

You'd need a pretty good vantage point, though.  Like the top of someplace
BIG and TALL.  (Well, yes, Rush Limbaugh is big and tall, but his restraining
order on the Freelance Police is still active.)