I am very likely to go next year too. I have an inquiry out to a company I contacted last year called Keys to Bhutan. Ultimately I decided to do Thailand and Vietnam this year instead but think I will do Bhutan in 2010. Keys to Bhutan organizes photography tours which is what I am most interested in.

There are some ultra-high end resort hotels starting to open but I hear they are astronomically priced and not worth it.

I have read the same things with regard to when to visit. Springtime (end of March to May is supposed to be really nice) and then autumn when the skies are clear. There seem to be lots of festivals that happen in autumn as well.

I guess the roads can be a bit rough with little in the way of "facilities".