I'm not sure there is an answer to that because it depends on too many variables. It's something you would discuss with the delivery captain (or whoever is asking for crew) before you commit.
Personally, if it is a paid delivery situation I have no problem paying for my transportation to or from the boat, but while on the boat I expect the captain to provide food. I was asked to crew on a boat participating in a rally to Portugal. In that situation I expect to help pay for my share of the food, but again, it's something that I will discuss with the captain. Every situation is different.
Know before you go.
Thanks for that. I was thinking it would vary greatly.
The sittuation I am looking at is more people wanting crew for their own boat. I see lots of people advertsing that they need crew on a "cost share basis" and wodered if the cost was prohibitive.
Thanks for your help.