Hi Nancy,
Yes, once the mail starts flowing to a reception inmate, greeting cards are fastest because the mailroom staff doesn't need to read them or look for contraband. Be sure to ask him to SIGN each form before mailing (this is a MUST) and send one form for EACH visitor.
I believe there will be handicapped parking and easy access as far as wheelchairs. You will be sitting at a back of phones for the visit, so that makes the wheelchair easy to accomodate.
I believe for phone visits, 3 visitors at a time, but you might want to call the visiting dept. and check on that.
It's NKSP - which stands for North Kern State Prison
The zip should be 93216, not 43216.
Hope this helps.