We went yesterday on a lovely bright and warm Saturday. We arrived early so fro about the 1st hour we practically had the garden for ourself. The Surrounding is lovely. We had a nice stroll in the walled garden and took the full trail around the park. Apart from the main pick-nick spot at the lake there is a more remote place in the woods with an amazing view over the lake.
Entrance is a bit pricey but you can spend the full day in lovely surroundings.