Hi silva. Welcome to the forum! With car seats attached to the 2nd row seats, there won't be much room to sneak in behind them. They do slide forward, but it doesn't look like it will be enough for an adult to fit through. That means that 3rd row access will be through the middle between the 2nd row seats. It's not impossible, but certainly not as easy as the forward tilt. We have a Britax latched into the 2nd row and tilt it forward for 3rd row access all the time.
2017 Pacifica Limited - Molten Silver/Mocha
8 Pax - Vac - SafetyTec - UConnect Theater & Sound
20" Wheels - Tow - KeySense - Splash Guards
2018 Mitsubishi Outlander PHEV GT