Dial the postcode into your sat nav and get a wiggle on!
If you are using old school paper maps and heading from the North or South we would tend to jump on the A1 to Grantham, then turn onto the A52 and follow the signs for Sleaford (A153). At Sleaford take the 3rd exit on the roundabout
For the A17 to Boston for a short while before turning left onto the A153 exit toward Sleaford/Horncastle/Skegness. Stay on the A153, we will be on the right just before Tattershall Castle.
By Public Transport
The nearest station is Metheringham. From here you just need to jump on a number 5 bus to Boston which stops in Tattershall town, about 10 minutes walk from the park.