Ever though about building a tree house? I just started off with the most simple design you can think off.
Choose 2 trees and connect them with 2 solid beams (6 by 2 inch)
Make 2 triangles out of lighter beams (3 by 2 inch)
Put the triangles on top of your solid beams, attach them to your trees if possible and connect them
You will have a basic tent-style treehouse structure.
Today I show you step 1. It's my first post so if things are not clear/visible/etc..., please tell me
The most classic way of attaching a beam to a tree is by using 1/2" x 4" lag screw straight through your beam and into the tree. This is the kind of screw you give a hard hit and then screw and then hit again, screw again, etc... It's really ok to do so but i don't like screwing into trees. I do something else which i first saw in Thailand, you use huge bolts and nuts left and right of the tree and connect your beams like that. I show here a picture of what i did. I did the above twice to be 100% sure my beams are not going to come down. So the beams are already resting on 2 other small beams before I put another 2 extra bolts in my 
main beams. It looks all a bit strange on the picture because my bolts were double the needed size and i had to put a lot of extra wood pieces to make it fit.
Secondly, a picture of the beams hanging in the air. Careful, this is not the beginner's way, your trees should be separated by 6 to 8 feet if you do it first time, my trees are 20 feet separated and my beams are not 6 by 2, only 4 by 2. This is asking for trouble :-) but I plan to put some middle posts, I have a lot of fallen trees around which i will use for that. Will put a 2nd post soon with hopefully steps 1 to 3 finished. I asked my children to do some acrobatics on it so you might believe this is actually not going to come down so quick :-)
Take care
bub
that looks like great fun! thanks for sharing!
Looks like the beginning of an Ewok Village! So cool!
Ewok? Are they those hairy dwarfs on Star Wars?
Yup
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I got here at steem because of your post at the wall of Tai-chillum master Chris.
Good luck!