Translation of nebensächlich

My family in Russia wants us to spend Christmas with them, but I don't think we'll be able to. My youngest brother spent 2008 in Moscow. The other one has already been there before and met all relatives. I wish you a happy and successful 2012.
On the second day we drove around Los Angeles. We were totally jet lagged (and so were our kids) and we decided to take it easy on that day. We went to Rodeo Drive as well as Beverly Hills. Both our children slept during the entire afternoon.
Have you ever visited the U.S. before and if so, where have you been in the U.S.? I've been travelling in California, it was very amazing. We have traveled by car. Here are my corrections.