How do I tell my fiancé that I’m going?

My sister wants to travel for her bachelorette. By the time it’s happening most people going will be vaccinated, including me and any that are not will be tested.

I booked a house and we plan on staying there and not going anywhere else.

I have to book my flight and I feel sorta weird traveling and then coming back to my fiancé’s parents house. I’m her MOH and I have to go(I do want to go).

My fiancé is very cautious about covid because his mom has an autoimmune condition. I flew back in October because I had to and was fine though.

How do I tell my fiancé I’m going? He’s known I was looking at houses for my sisters bachelorette and I potentially mentioned I had to book it.