I called at 180 days and I knew that I had to book it later in my trip so that I could try to be one of the first groups to reserve. We called on the date that we wanted to go to Le Cellier on the +10 day and that was the Sept 26th. For split second, the CM though I had said the 19th (one week prior) and she said "I am sorry, there is nothing available for either lunch or dinner on this date" I was like WHAT? Then she had realized the mistake. But, even at exactly 180 days, Sept 19th was completely booked. I'm not saying it is now but I was like whoa!
We enjoy going to Le Cellier simply because I am a red meat gal and it's the only SH in EPCOT. I know Yachtsman is close but it's dressier and still NOT in EPCOT. I'm actually one to say it's simply good, but doesn't deserve all the praise it gets. We book two ressies each year though now that we do the DXDP so we have A LOT of credits to go through.
But with Le Cellier... California Grill... or just busier locations, I tend to put these toward the end of our trip so that we are one of the first ones to snag the times we actually want opposed to a 3:30 lunch... OR dinner.