I am very pleased to hear that 10 years after diagnosis you are still feeling fit enough for this cruise.
As a medical specialist in the area I know that Parkinson disease, while variable, is often cruel. I've seen some patients doing well after 25 years yet my older brother had a more aggressive variant and was diagnosed at 63 and died from it last year at 71.
As you say we still need to find better treatments/ preventive strategies.
Ready Steady Boxing sounds like a good program - I hope your fund raising is very successful.
Peter HK