Wayne,
Go because you want to go away with your son and have a great vacation to Arizona.
If this is son's first experience in front of scouts it might be a good time to start. Also know that often times scouts also make suggestions to coaches when they see a player that might fit their program. Also their may be schools there, D2,D3, JUCO but most likely close to that state. If that is a goal (to go to school out that way) it may be helpful.
Just be aware of all these invites, you have to research. All American sometimes is a word used to get your parental pride flowing. And the recruiting process can become very expensive, IMO best time to spend is when needed most.
I see you are from Alabama, if your son has talent and you give him exposure, there are many good programs within the southeast.
Hope that this helps.