I have been to Huatulco a few times in November and the fishing is usually really good for mahi mahi and sailfish. It's variable of course but I usually always caught at least one (and sometimes many...). For a two-week trip I would plan on going twice to increase my chances of having a good day. We always go with Tico, of Fishing with Tico. You can find reviews on Trip Advisor (
https://www.tripadvisor.ca/Attractio...rn_Mexico.html) or go on the What's Up Huatulco Facebook site and try to track him down there (
https://www.facebook.com/groups/545832165582787). I took a look on the site but I was having trouble finding his contact information. It's the slow season right now so he might not have current information up anywhere.
Tico has a smaller and a bigger panga to chose from. There are many other good boat captains to chose from. I would suggest that you join the above Facebook site and look for postings. It's also a great resource for Huatulco in general.
Feel free to contact me again via a message if you have any other questions.