Here's the route I followed (moreless how I remember, but I think is accurate :) ) in case anyone would like to try getting bigger

I havent read much guides, but some I did focused much on size you needed before going on to next zone. I do much the same ...

Also, I've played the spanish game, so I'll probably wont be accurate on some item names, but I suppose that if you get it as a description and you know a little bit the level you'll know what I'm talking about ;) if not, my apologies

We start on top of the mountain, picking up 4 of the kokeshi dolls, then going around to get some roasts, some dolls, and all of the trumpets, then some logs, then pick up some of the kettles and go down the hill through the fallen fence, turning right. You'll be about 80cm or more, but you can come down here at about 73cm or so.

There we pick up the newspapers, the broom, the shovels, then run till the end, picking up backpacks, gas tanks, and then turning around and going through the tents to get 3 boxes, all the garbage and then the chair on the left, then the laundry pool at right, and the dolls and bears in the stands

Now we cross the river pickin up the sunflowers, pick up the logs, mushrooms and things till you're about 2m40cm or so, when you can go down the falls, picking up much everything, including the fence

Then we pick up the sunflowers at right, and cross the bridge picking it up. Then we pick up the high weeds, all the logs going to the house, and then pick up much everything around the house.

You should reach about 5m there, and there you go and pick up some rocks near the fall, go down to the beach and pick up the table and the big watermelon, and now go up carefully through the fall again, so you pick some rocks, and then at the end the trees

At this point, I like to go in a rush crossing the stage to the bbq place (where you start in campfire small), passing through the middle mountain picking up the fence so I get a little bit big and wont extinguish, and start picking up all the weeds there, or all I can, as the ones near the bridge are easy, but the ones at the end are quite risky.

Anyway, risk till you think you should, and then pick up about EVERYTHING in the BBQ place. moving then forward to pick up all of the tents, and pretty much clear the place.

Then you cross again through the middle mountain, picking up the tippi and all you left roaming around there, to continue left and pick up the rocks at the right, the trees, the tents left, and some of the trees

At this point you should be able to get the van, and go to the trees near the laundry pole, as there are some more trees you can get.

And then you roam around picking what you can, remembering to clear off the mountain fence, and minding there's few stuff to get now ...

Anybody sees ways to improve this route?

Nice description, good job.
I followed pretty much the same route you described, but I couldn't get as big as you. Don't know why... I tried a lot of times long time ago.
Maybe I'll reget the game and give a try. :)

btw, that's not 6 meters, but 9meters. :heh
There's a mistake in the title.

right Lo7 ... corrected it :P

btw, Have you played again WLK this holidays? :)

Nope. I'm too addicted by Guitar Hero now.
Since you broke some records I may pick up WLK again and try to reget what I've lost.
But I'm really out of practise, I haven't played it since September. :heh