Americans are Flocking to Mexico. Should They Be?

“During Covid, bookings never slowed down,” she said, noting that some resorts are planning to begin charging for the tests later this month, with rates running from $50 to $150.

In Los Cabos, Mr. Chung paid $40 for his Covid test.

Lynda Hower, a travel adviser based in Pittsburgh, was vacationing in the Cancún area with her family earlier this month. She said the airport customs lines were crowded with several flights landing at the same time, resulting in little social distancing. To reach the resort, she opted for a private transfer. A few days before returning home, the family was tested for free at the resort and able to receive their negative results via text at the pool.

“It was very professional,” she said, noting she got the results in 20 minutes.

No 4 a.m. tequila shots

The state of Jalisco, home to Puerto Vallarta, is green on the stoplight system, and it’s not hard to spot a tourist in town, especially as travel has picked up this year.

“The majority are still masked down here and if someone is not masked, you can assume they are probably a tourist,” said Robert Nelson, a California native who lives in Puerto Vallarta and runs the subscription website Expats in Mexico. “We are working hard to get more people vaccinated, but we need a little help from the folks visiting to abide by the local regulations.”

But even compliant travelers will find the experience changed, because of fewer visitors or safety protocols.

“Don’t expect bars to allow you to stay until 4 or 5 in the morning doing shots,” Mr. Nelson added.

In San Miguel de Allende, the popular colonial town in Guanajuato in central Mexico, public statues are dressed in masks and anyone entering the central plaza must pass through an arch that mists sanitizer. Local police admonish visitors to wear or pull up their masks and have been known to take scofflaws to jail for flouting the rules.

Ann Kuffner, an American retiree who has been living in San Miguel de Allende for the past three years, is telling friends who want to visit to wait until fall when vaccination rates will be higher and the events for which San Miguel is known, such as Day of the Dead festivities, may safely return.