We had breakfast at Trail's End Buffet the 1st week of June-2002. The price ($8.50 for an adult; $5.50 for a child) is probably the lowest you will find at WDW for a buffet. I think, in addition to what is listed at
Trail's End Buffet Menu , (Scrambled eggs, sausage, bacon, hash browns, sausage gravy with biscuits, French toast, fresh fruit, donuts) there were grits, oatmeal, and pancakes.
We went "mid-morning", I guess around 9:30-10:00am; it wasn't crowded and we didn't have to wait for a table. To sit down and eat, I think there is only the buffet (full buffet or continental breakfast), but you can purchase donuts and pastries to carry out. I noticed the price of a donut there was 60 cents compared to $1.00 for one at Roaring Forks in WL.
Service was great (mainly picking up empty dishes and refilling our drinks) and very friendly. The food was fresh and the buffet was well stocked. I don't know how busy the place is early in the morning before the Parks open or during peak season.