Doable certainly, not very easy though but it depends what you call easy I guess.
Straight line distance of less than 40nm, though I would do a dog leg by heading due east along the outside of the ferry's channel out of Rammers to get well clear of the sands. TSS is often a challenge, AIS can help but expect to have to have your brain firing on all cylinders.
Gravelines is a very pleasant town adjacent to Dunkerque, worth a look if you have the time.