Hi Ron
I always go over the bridge now it's shorter but watch out for traffic coming the other way and the branches sthat stick out! I have tried the other way but found it a little narrow on one tiny bit, if you look out for a line of tall pine trees on your left about 1/2 mile from Swanage you will see a pub on the right The Royal Oak the left turn is opposite at the Swanage end of those trees a bit tight and if you are travelling too fast you could over shoot it!
It's just a short walk to Herston Halt where you have to flag the steam train down to go to Corfe Castle or Swanage
Have a great time and you are welcome to pop in if you want as we are not away this week as Sue is on chemo!
A sign in the Royal Oak

Got some great views from the site
Herston Halt
Swanage Station
Regards Pat