Beach vacation with dog

Hello ladies, I would like to go to the sea in August with my Golden Retriever bitch, who will then be 9 months old. To better enjoy the time and especially the restaurants, I would like a vacation companion. A prior exchange is very important to me personally, after all, it should ideally run harmoniously and respectfully for over 7 days. I have already looked at a few holiday apartments in Schillig near Wilhelmshaven, where there is also a dog beach nearby. Understanding of a dog's needs and affection for animals are prerequisites. I am curious if anyone is interested in such a trip and look forward to your message. Best regards Benjamin