If you are planning to stay mainly downtown, you don't necessarily need a car. If you are planning to explore the surrounding areas, then a car would be helpful. There are multiple car rental companies at the airport and also a few offsite that are listed in the resources.
What if I want to bring my children?
The wedding events will be adults only, however many of the hotels will have babysitting resources. Piya also knows a few babysitters so feel free to reach out to her.