I serve on the Board of a 501 C-3. I attend a Board meeting/national conference. I know my travel expenses (unreimbursed) are deductible; is the conference registration?

As a Board mmember of a 501 C-3, I am expected to attend the two "live" Board meetings/year. I am not compensated in any way or reimbursed for expenses associated with attending the meetings. One of the meetings is connected to our national conference which carries a $500 registration fee. I am expected to attend the conference and pay the fee. I know I can take a charitable deduction for my travel expenses. Can I also take a deduction for the conference fee?