I'm the original poster and do have a 50T Master's ticket, but am not
doing drug testing, nor does my craft have insurance for charters. This
is an uninspected boat and I'm aware of all of the six-pac issue, but I
don't think any of these apply to the situation I'm asking about.

If I do this trip, I will not obtain any type of consideration,
"directly or indirectly flowing to the owner, charterer, operator,
agent, or any other person having an interest in the vessel." as it's
stated in the CFR. I am also not in any way connected financially to the
charity. Think of doing this for Habit for Humanity or the Salvation
Army or a church or something like that.

I don't believe this type of boat trip requires any license whatsoever
for that reason.

Capt. Jeff