Timothy Ogden and his fiancé Sarah Farmer were driving back to their hotel around 9:30 p.m. Saturday after a long day at the Wildwoods Irish Festival. The couple attended the annual festival every year, enjoying the food and music along the Jersey Shore, said Ogden’s aunt, Stephanie Ogden. But on Saturday, crowds in Wildwood had swelled with more than 500 vehicles affiliated with a pop-up car rally — known as H2oi or, H20i, or H2022 — jamming some of the streets and causing chaos in parts of the resort city. An intersection was blocked off with dozens of people as Ogden and Farmer’s car approa…