Change of plans?

We finally found (Tuesday it was finalized) something that would work for us to do in the morning these next two weeks--teach 1st and 2nd graders at school. However, today, after dinner, we found out that we cannot teach there because it is a government run school and the government does not want any foreigners going into the schools. We do have another option, which would be to teach preschoolers at a private school. The school is a bilingual school, but the 'foreign' teachers (the ones that teach English) are on vacation this month, so they'd be excited to have us there. The only thing is that it is an hour and a half bus ride away. Also, seeing how we already told them we would be teaching at the other school, we don't know if it's still an option. I would greatly appreciate it if you could think about that. Thanks a bunch!