All depends on your choice for breakfast. When we stayed at the YC in '17, we had to walk to BC to get a decent breakfast. The quick-serve in the store in YC didn't have the options the cafeteria in BC had.
Again, experience is only from our one stay in '17, but if I remember correctly, they don't always share busses. Peak times ran separate busses, off peak was shared. I remember one time, that we were waiting for a YC bus, and a BC bus pulled in in the stop next to ours and feeling jealous (I know, I shouldn't) that their bus came while we were still waiting on ours, since it was the second BC bus that had pulled in while we were waiting for the first. But the lines were long enough that there was no point in hoping over.