Can you do too many details? I don’t think so. As long as you have the time and have fun, you can add as many details to your layout as you want.
Because of the rather large windows parts of the interior of the hotel is quite visible. So I have started to model the ground floor bar. The photo shows the counter with its beer pumps, bartender and a thirsty couple. A waiter is serving coffee for a couple of seated ladies. Everything and everybody will be transferred to the hotel itself. I am just waiting for around 200 guests to arrive from overseas. With the current COVID-19 restrictions and closed borders it will take a while. Meantime I will install hotel’s doors and signs.