I agree with BC. Also 20+ years.
In the future, I'd make sure that you must sign a field trip form for each and every trip off site. Standard "may transport" blanket permission just does not fly anymore.
Each trip should outline educational goals, place, meals, activities, times of departure and return. The trips should be about the children during daycare hours.
You are paying for that, after all. Here, off-site trips require a second provider, because ratio drops almost in half.
30-day notice of closures for vacation and around 3 emergency/short term notice closures per year should be about the norm. I have not had an emergency short term closure in over 5 years. It isn't that common with most providers. Our lifestyles are generally not that chaotic.
Pets should never have access to children during daycare hours. Daycare kids should never have access to pets, for the very same reasons.
Good luck in the future. Never fear court if you are right.