Yes, there is always work to do but we have implemented a 1:8 W:R ratio. 1 hour of work for 8 hours of relaxation.
In reality, the number one thing I can say is that the two of you need to be best friends and really like spending long periods of time together. You can always find things to work on but if you can't kick back and spend an hour watching the sunset, or relax and read for a few hours, or play cards on a rainy day - you are going to be in trouble. There is so much to enjoy, so much to see, so many to meet.
How lucky I think I am to enjoy such a life!