I have stayed at WL multiple times, the most recent in November 2014. I am anaphylactic to milk, tree nuts, peanuts, and seafood (all fish, all shellfish, etc).
The last two trips I have gotten allergy safe Chicken Tenders at Roaring Forks, and they were able to make safe french fries too.
Unfortunately, I do not know what type of mix they use at RF. It may be possible to find out by writing to WDW's Special Diets team and asking. I would suggest in your email you put in a caveat about you understand that suppliers may change and so what they have now may not be what they will have when you visit. Also, you can always ask if they can arrange to have Namaste mix on hand for the dates you will be visiting -- especially if you plan to have many breakfasts at WL.
I always let Special Diets know well in advance of my allergies, ADRs, and tentative QS plans. I ask questions and once I get past their initial automatic response usually get answers.
Regarding RF specifically:
On one trip (can't remember if it was the last or the one before), we arrived mid afternoon and wandered down to RF, hungry after many hours of travel. The manager happened to be available, and I explained that I had multiple food allergies and would be eating at RF frequently over the next few days. The manager got the allergy binder and together we went through all the items I thought I would eat during our stay (so all meals, breakfast, lunch, and dinner). This was very helpful as it helped me plan my meals for the next several days. The manager was helpful and informed.
By ingredient the Bountiful Platter's eggs, potatoes and bacon were all safe. The next morning, when I went to order my breakfast, I nearly did not tell them about my allergies. But at the last minute before ordering I decided I had better. At best this decision saved me from getting very sick, and it may have saved my life.
Here was the problem: the ingredients are safe according to the book. However, when I explained my allergies and explained the manager and I had gone through the ingredient book so I knew the eggs and potatoes and bacon were safe, the supervisor said that actually they add some butter to the eggs and to the potatoes to make them moister. !!!!!! So, they are adding an unlisted ingredient that is a top 8 allergen. Great ! The supervisor was able to make me SAFE eggs and potatoes, fortunately.
The lesson I took away was:
ALWAYS explain your allergies, EVERY TIME. Disney does a great job, but situations like this can occur. I prefer not to think what would have happened if I had not explained my allergies. When I explained my allergies I always got good service, though it can sometimes take a while. Also, one non-WL QS did refuse to serve me as they could not make the food safe (they have a limited kitchen space); while frustrating because that was the only QS open for breakfast at that resort, I was able to get some packaged hard boiled eggs and fruit from the refrigerated section and that worked well enough.
I now carry allergy cards with me - there are various ones out there (free and to buy), but I was not happy with the wording on any one of them, so I combined the best wordings, added some of my own, and created my own "cards" that I print out on the blank side of 4x6 pale yellow index cards. I also have one card that I laminated which is "mine". The yellow ones I freely give up to servers/chefs to take back to the kitchen with my order. I carry them at all times in my purse. They are useful at home at the small number of restaurants we visit, and they are great when traveling.
We alwyas enjoying doing some resort hopping from WL. Take the boat to Contemporary, explore, then monorail hop to the Poly, explore, then to GF, explore, (maybe eat at Gasparella's... who was able to make me safe pizza

) then to MK and take the boat back to WL. A nice relaxing couple or few hours and we love taking the boats.
Our next trip we also won't be going to the parks, except for one night doing
MVMCP during the non-WL part of our split stay. At WL we plan to take the 9 am tour of the Lodge one day, hang out at the pools, explore and take pictures in and around the resort, do a bit of resort hopping to visit the MK resorts, do some resort hopping to go get Dole Whips at the Poly (my plan is once a day

).
SW