If you were taking the bike, I would have recommended a ride around Shouldham Warren and then food and drink at the King’s Arms. Great pub, community run serving superb locally sourced food, beers and cider. The Hare Arms also in the same area at Stow Bardolph has always had a good reputation. Both pubs would be on your way back from King’s Lynn towards Thetford. The wife has reminded me that Biltons on the A10 at Tottenhill, recently opened and has quickly built a good rep locally, not been so can’t give you a true review of the food. Another is The Berney Arms in Barton Bendish but I believe it has recently changed hands.