That's a darned good cause to donate to Tommy. Thumbs up on that one. Call your local chapter of the American Cancer Society.....they'll hook you up pronto.
I did over 50 gallons of whole blood donations, then went into the apheresis/platelet donation and did over 23 gallons there before the veins got shot. The apheresis is a part of marrow donation and a person can donate every 8 days instead of every 60 days on whole blood.