Sorry I haven't followed up given all the nice (and realistic) recommendations we got for our trip to Falling Water.
First off, Falling Water exceeded our expectations and we had a wonderful time.
The bad news is that we got lost for so long and we had booked the In-depth tour, that we barely got there on time and were relegated to the FW-Cafe.
I kid you not, there was Bahn Mi on the menu that day! Given that it wasn't a vietnamese restaurant it was perfectly respectable. Pork was tender, lots or cilantro, pickled veggies and a spicy mayonnaise and chilis. GTFO!
My wife and I shared a red pepper and bacon soup that was really good and her knockwurst was, eh. The cookies there were damn good.
Save your gas and headaches and eat at the Cafe. It's a great cause and the food was good!
Got a page from work, ran to hotel after getting a tuna sub at Subway, and worked till late.
All in all, a great weekend. Ok, food-wise, nothing special. But unexpectedly good food while supporting a world-renowned landmark was alright with me.
The final giggle was we drove right past Primante's on the way home due to it raining so hard. We didn't miss it, we were in a downpour to end all downpours. Bad forecast and too much work kept us from pulling over and waiting it out.