We were at GK's back last May and say Chip and Dale there. My son even got his picture taken with putting Chip's apron in his mouth. I don't know what kind of Disney magic came over that kid, but pretty soon Chip did too. I have great pics of the smile on his face with the apron in his mouth.
That sounds adorable, mmlover74! Did you post the apron-in-the-mouth photo on our character meal photo thread? It sounds familiar but I am not sure if I saw it. We'd love to see it there on that thread! One of the chipmunks (don't recall which one off hand) came over to draw on our table and autograph it, and then the other chipmunk came over later to draw too and cover up whatever the first one drew! It was so cute - and we are all adults, no kids with us!!

I also love it when they make little
chipmunk sounds - that is the funniest thing!!
Okay, according to the CM I spoke to at
Disneyland Dining (not always a great pillar of knowledge, but this seems fairly accurate), they say that NO characters are guaranteed at any of the meals except Goofy at Goofy's Kitchen, Chip and Dale at the Critter Breakfast, Minnie at Minnie & Friends, Mickey at Surf's Up with Mickey, and Ariel at Ariel's Grotto Princess meal. Other than that, it is a rotating cast of characters.
The CM also said that even though C & D
are guaranteed at the Critter Breakfast, they are
not always there at the same time (which is what happened when we were there in October), but usually they are together. One of them might go out on a break or one of them might arrive earlier than the other. So it is possible, as was the case when Vala went, that one of them could be missing for an hour. Goofy may take a break, but they try to get Goofy back in ASAP because he is the host and "chef" at his restaurant (and they need the little ones to believe he is back there cooking!).
The Dining CM said that 80% of the time, C&D are at Goofy's - for breakfast and dinner, too - which would explain why I always see them, but she said there have been random days here and there that they are not there (like when Aussietravellers was there), and it is never pre-determined, like if one of the other restaurants needs them and there are no other Chips and Dales available to come to Goofy's. It works the same way for Minnie & Friends - they are not there 365 days of the year, but more likely than not, you will see them both, or at least one of them. She said the characters
do switch shifts, so a couple might leave and there could just be a few characters on duty while they wait for the new ones to show up. They try to never have fewer than 5 characters at Goofy's, but sometimes it may be 4 if they are transitioning.