Bus service to Low Lorton is very infrequent. To use it, you need to be in either Keswick or Cockermouth. If you need to be in Keswick or Cockermouth - Oxhnholme/Windermere is not the place to start. Take the train to Penrith, then the bus that heads to Workington (via Keswick and Cockermouth).
You're heaeded for a beautiful spot, but you'll need military planning to use the sparse bus service.