It’s possible, we went there many years ago, brought our own food and the hot spring eggs at the scenic area were very delicious.
Lake Constance can be taken in by oneself and eaten. However, this winter seems to not have been open for business.
It’s okay, we went there years ago; I brought my own snacks. The hot springs eggs in that scenic area are very delicious too.
“You can bring your own food to connect lakes, but it seems they’re not operating this winter.”