Dear M.,
I don't have a child with spina bifida, but through the years I've been a home health peds nurse to several kids with varying degrees of it. From my perspective, I have to consider their universal allergy to latex. Other than that, everyone is different.
I agree with Karen, who suggests looking for support groups. Support groups won't just be good for you, they'll also be good for Sammy. He'll make friends with the other kids in your support groups and potentially know them through adulthood.
Just like any other play group, support group, scouts, etc., if you join one and you don't like it or the people in it, try another! If you try another one and don't like something about the people or the atmosphere, create your own!! By that time, you have an idea of what you are looking for in a peer-support group.
You don't mention any specific issues you're having right now that prompted you to write. What's happening? You might find out that many problems that you may be having with Sammy are unique to his age group, not his diagnosis.
As Theresa says, "It is all about getting the right team of doctors and surrounding him with the right people with 'can do' attitudes". Living in Wilmington, NC, I can tell you that the kids around here all receive their specialty medical care at UNC Chapel Hill Hospital. I see you live in Chapel Hill, so you and Sammy are definitely in the right town!!!
And I agree with Kathy, who says "Love your son and cherish him!"
Keep us posted and good luck!