Yes. All adults and Children need passports to and from Mexico. Right now passport fee is $130 and wait time is 8-11 weeks.
Tulum is not the most “kid friendly” however If you want to bring your kids they are welcome. We recommend Dreams or Nerea as most hotels don’t allow children.
Rental cars are available but not needed. It’s almost easier to not have a car in Tulum. We will be working with a transpo company for bigger groups who fly in to Tulum together. They have a 9 person van for a $160 one way fee. Every hotel in Tulum typically will provide and arrange airport transport at your request. Otherwise there are numerous cabs outside the airport. The price should be around $80-$150 USD. Drive time is around 1hr to 1:30 depending on where you’re staying in Tulum.
Transportation will be provided via bus from hotels to the ceremony. You cannot drive yourself to ceremony.