We wrote our routine out for MIL when I went back to work. Although they always said he would not sleep, or has only slept for 30 mins etc. but we always found that they over stimulated him way too much.
We did find that it was easy to get him back on track, and once they started following his cues, things did get much better.
I would not worry too much if your day does not go too much to plan, or if there is any AP involved, things will get back on track.
I agree with momofclare, that it is great for them to be taught to adapt. We never went out during nap times at all, now as a toddler we cant get DS to sleep in the push chair. If we are out and it is nap time, he will not sleep until we are either in the car or at home.
But on the bright side, he is a fantastic sleeper when we put him in his bed