Going to be traveling soon!

So I have come to the conclusion that mom isn't doing too well.  She just isn't right.  Dad has mentioned to her that she needs to go to grief counseling.  She won't have anything to do with it.  I think that he is right.  Anyway, she is miserable.  I understand that she lost her son, but she is going a bit overboard.  She has days where she doesn't get out of bed, nights that she doesn't sleep, and just all around funk.  I think of the family that Maria mentioned where the son was killed in a sledding accident at age 8 and how that mother is going to handle all of this. 

My mother's situation is a little strange in the fact that my parents live in a RV.  My father works as a project engineer for a company.  When my brother passed away, they were in the process of finishing a project in Austin and moving to San Diego.  They came home (Illinois) from Austin for arrangements and never returned.  Their RV was transported to San Diego and met them there.  So my father is starting a new project working 6 days a week and my mother is living in 800 sq ft.  alone in a new place where she doesn't know anyone.  Normally this isn't an issue, but with fresh grief it is not going well. 

So I have decided that I am going on a surprise visit at the end of the month!  I talked to my dad today and he loved the idea and suggested that I spend my brother's birthday because he thinks that will be a difficult day.  I am planning on flying in on a Sunday afternoon (my dads only day off).  She will only know when they come to the airport to get me!  I will spend the week with her and then come home.  My husband has been gracious enough to even suggest that the 2 year old stay home!  AWESOME!

Any suggestions on helping her through this?