Campbell and Dixon made their intentions known via their respective post Thursday on Twitter.
A redshirt sophomore, Campbell posted a video of himself with one finger raised and the caption: "One more."
Campbell recorded 40 receptions for 583 yards and three touchdowns last season. He began the season with six catches for 136 yards and a touchdown in a 49-21 win over Indiana.
Campbell also rushed 10 times for 132 yards and a touchdown.
Dixon also made his intentions clear over social media, writing: "Unfinished business! 1 last ride Gobucks."