Well, yes, it's a busy time and a holiday weekend, so it's harder than usual to reach people and do business. As frustrating as it is, you are doing the right thing by not driving. It might not seem like it, but it could be so much worse.
Another thing I wanted to say is that when unforeseen circumstances come along, like your lawyer's knee surgery, and they mess with your plans, try to believe that this is part of the Universe's plan for you. You don't need to understand it, but have faith things are unfolding as they should.