I did something similar. I brewed 11 gallons of BeerMuncher's Centennial Blonde. Everything went perfectly. Hit the numbers dead on except the first 20 hours of fermenting temp. I brewed last night, beautiful night and temps around here have only been down to the upper 50F degree mark at night so I left the buckets outside. I should have watched the news, last night frost warning. When I woke up this morning it was 39F degrees outside.
After I got home from work today I brought the fermenters into a 66 degree house. 5 hours later there are some signs of fermentation going on. (Ok, bubbles in the airlock) Pretty sure this beer will turn out just fine, I believe I put the little yeasty critters to sleep for awhile but they'll warm up and wake up and get to the job at hand.
On another note, made 5.5 gallon batch of SNPA clone tonight. Pitched, numbers all turned out well again but this time cooled to 67, pitched yeast and it is sitting in the 66 degree, maybe cooler at night house.
Trying to get a pipeline re-built. Still have about 11 pounds of grain left and would brew tomorrow night, but no more fermenters available! Argh!