How can I get connected with other brain tumor survivors and their family members?

Try the ABTA site. Try this site: http://www.Abta.Org/care_and_support/48 good luck.
Ask the oncologist. Most oncology programs have support groups. Most have associated psychologists who specialize in coping and acceptance. Local and national cancer groups are easily available. Any cancer survivor is good to talk with. Specialized nurses are usually excellent in providing support and suggestions.