Honeymooning with my future husband’s family… advice needed

I (29 f) am getting married next year in June to the love of my life (32 m) we also have started planning our honeymoon for the fall of the same year. We’re going to Scotland & I’m super excited for all the pretty fall colours & it also won’t be super busy with other tourists like it is in the summer months.

But here’s the thing; my fiancé got the idea for this trip, along with his family, before we were engaged. So his mom & stepdad will be going down there as well, & maybe his aunt & two uncles (his mom’s brothers) After we were engaged & started talking about our honeymoon, he brought up the idea of having the first week to ourselves. And then staying with his family for the rest of our trip…

Please don’t get me wrong, I absolutely LOVE my in-laws. I personally think I have some of the best ones! His mom is so lovely & wonderful to be around, his stepdad is pretty sweet too! However, I thought the point of a honeymoon was to relax together as a newly married couple?

I really want to bring this up to my fiancé & tell him how I feel about honeymooning with his family, but I struggle with really bad anxiety so just the idea of having a conversation like this stresses me out. Am I just over thinking this idea & should try & go with it? I’m not trying to steal my fiancé away from his family at all, I just think a honeymoon should be for the newlyweds only. Who is in the wrong here? Any advice is appreciated as I’m already stressing out.