Love the idea of the hobbit house. May use it for my Fairy Glen. Also, how do you use bamboo in construction, as you did in your shelter? I may have access to a large grove of bamboo and I would like to know how to work with it. What sort of fasteners are used?

I'm glad the fasteners were not visible. All I used was electricians zip ties (as strong as you can find) purchased from Home Depot. Needed to string 3 together for the thicker canes. I still have to go and snip all the loose ends off but quicker than screws or nails. I guess to be asthetically (?) correct I should have used rope which would give a more natural look but I don"t know my knots. Some skilled craftsman would have notched the canes like building a log cabin. I tend to look at function, not form, so as long as it looks OK and keeps the rain off I'm happy. I'm not going to use it for more than five or ten minutes at a time and its very unlikely anyone else will use it.
The other thing to watch is the weight of the poles. Some I grow are full of water and are really heavy to carry in long lengths. If you drill a small hole in the cane and drain the water out it makes life easier.
Another thing to watch is the building grade of the bamboo. Some bamboos I grow can crack as they dry and canes less than a year old are too soft to work with. Some varieties will rot once cut rather than dry nice and firm. Canes two or three years old or older are best. Good Luck.

Thanks for the tips! I don't know what kind of bamboo we have here in Pennsylvania, it's obviously winter hardy, it forms HUGE spreading colonies and the stems are yellow. I've never seen them get to any diameter bigger than about maybe 1.5 inches, 2 inches? I doubt that it's "construction grade" but like you, I would like to use it for "quickie construction."