We are presently 20 miles from Cancun
. We entered at Isla Mujeres using an agent...No problem encountered, total fees
$200. However, they want to see a Zarpe and since US doesn't issue them you need to get form 1300 off the internet
and have some official stamp it.
We then had to go to Cancun and get a boat import
certificate. You need this if you are staying for more than 10 days or so but it is good for 10 yrs including re-entry and costs $50.
Marina Puerto Isla Mujeres and Marina El Cid in Puerto Morelos are both excellent and safe marinas
(lack of theft and safe from bad weather
especially the one in the Lagoon
in Isla Mujeres) with low long term rates ($20-$25/day for our 55 ft boat)
Another advantage of a good marina is that they have good relationships with the Port Captain and immigrations so they can smooth the process.
The agent is a guy who works at the marina, has a copy machine as they want 6 copies of every form and everybody is his cousin. Well worth the $50.