It's very hard for me to give you any advice in this area because I don't know your competency level.
For me, when sailing my own boat I go to "Crew Finders" and post the voyage info and the level of knowledge they should have, which for me is none in the unpaid section. I prefer to teach those who know nothing about sailing than those who do things another way.
If you needed professionals for any reason I'd look in the "paid" professional section. But I always go to the professional sites where crew members have to pay a fee to belong, so I won't find myself with a wholly unsuitable individual, and look more. Their fee is proof to me that they are serious and interested in sailing enough to shell out a few bucks.