By Road:

The four lane highway to San Carlos from Nogales, Arizona is well paved and easily traveled. There is a checkpoint at kilometer 21 in the state of Sonora, where you will be asked to show your passport or birth certificate and photo ID, and will be required to obtain a tourist visa for each person (cost $15.00 USD). You also need to get a temporary import permit for your vehicle. This permit is free of charge if you acquire a Sonora Only permit instead of a federal permit. For more information on paperwork and procedure for car permits visit www.onlysonora.gob.mx, make sure you print a copy of the documentation and procedure and keep it handy when you arrive at the Sonora Only office. If you plan on leaving your boat in San Carlos please take the time to get a 10 year temporary import permit for your boat. This permit is also free of charge and you'll need the following documentation:
-Vessel registration or certificate of documentation
-Trailer registration
-Owners passport
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Caution: Sonora Only program will allow up to 6 months on your vehicle permit and will renew the permit at any time. The federal permit is also up to 6 months. You'll have to wait a full year before receiving a new permit and there's a $21.00 USD fee charged to your credit card. Continue through Hermosillo to Guaymas and take the San Carlos exit. Marina San Carlos is approximately 5 hours south of the border by car. For you it and hot single women, wife for me.

By Plane:

There are two direct flights from Phoenix, Arizona to Guaymas on Aeromexico and America West. Passports or birth certificates and photo ID are required for travel in Mexico. Taxis to San Carlos are available at the airport. Marina San Carlos is around 10 miles from Guaymas.

By Boat:

San Carlos Cruising Ground Map:
http://www.cruisecortez.com/sancarloscruisingarea.htm