You look great! I would bring the pants, but maybe don't expect that you'll be able to wear them more than one day, just in case... I don't wear white pants but I do often bring and wear my white skirt when I travel in the summer. And yes, sometimes I spill coffee on it but it washes out. My skirt is thin cotton though so it can be washed in the hotel sink and dries quickly. But still... if you spill something on them you can probably at least soak out the stain in the hotel sink, even if the pants won't be wearable again until they get a real laundering.
PS - I love your cherry blossom tee! Where is it from?