Our first visit here and it won't be our last. Lovely site,warm welcome and great facilities.  Would have been 5 stars across the board except for the location next to the road and the (slight) noise that can come from there.  One piece of advice for those going up to the Visitor Centre - leave early if you are walking - there's a lot to fit in if you are visiting Sandringham House/Garden/Museum as well.  We didn't and will be back to do this next time.  Mind you the walks around the estate were fantastic in themselves.