Well, Wendi2000 posted a great dining report (with some yummy pictures!) that showed that she did use a CS credit to get the Bounty Platter at Mara, so I'd guess it would be the same at Roaring Fork - here's that part of her report:
Originally posted by Wendi2000 1 CS Credit/1 Snack Credit
Food: ****
Service: ***
I had a hard time rousing Max this morning. Oh well, I let him rest and then we went down to get a big Breakfast Bounty Platter to share, a Coffee for me (in the mug) and an Apple Juice for Max, I also grabbed a PowerAde to take with us to the parks. We took it back to the room and sat out on the balcony to enjoy it. The breakfast was really good, and too much food even for two of us. I was under the impression though that with breakfast on the dining plan we were supposed to get two beverages since there was no dessert the cashier told me that with the Bounty you only got one drink (which is fine, but probably shouldve been pointed out at the time I ordered it or maybe a sign???) Also, she told me that the second beverage couldnt be the larger sized one Im not sure why. We did get one large sized beverage with the Bounty though, and I filled my mug with coffee and used a snack credit for the other drink. We headed to the Animal Kingdom after breakfast.
Here's a direct link to click on to the rest of her great report "9/15-9/22 Max & Mommy Eat Around the World" :
Thank you, Seahunt! My friend's going to WDW in a couple of weeks and has never been on the Dining Plan. He'd asked if he could get this for 1 CS credit, and I was unsure. He'll be so happy. Thanks so much!!