You went at a lovely time of year then, fall in that area has to be remarkable.
I think it was built more for a weekend get away. According to the guide, the owners called Wright just after the house was built to say the roof leaked. He told them to put a bucket under it lol. I am originally from Illinois and have toured a few of Wright's designs over there. I could be wrong but it seems like he came up with Lincoln logs, wooden toys for building little log houses.
I have the same birthday as FLW, and may be hiring a person with the same birthday as well. I have studied probabilities some and I believe in a random group of forty people, a very high percentage of the time (85% or so?), two will share the same birthdays.