Family man Pete Wentz was loading up on Halloween fun with his two boys -- and it was a super cute family affair!

The Fall Out Boy bassist took girlfriend Meagan Camper, their son Saint Laszlo and his son with ex Ashlee Simpson, Bronx Mowgli, to the pumpkin patch on Wednesday -- and boy did they look like they were having fun!

The petite music man, who was outfitted in a Def Leopard t-shirt and jeans, loaded up festive fall goodies and even used a wagon to cart his pumpkins to his car. Looks like Wetz is gonna have one spooktacular holiday!