I’ve had two trips with my in-laws:
- A short trip to Chicago for a wedding.
- a 10-day trip England
These two trips were amazing. I had so much fun, and it helped definitely to break the ice between me and my BIL. We played games on the car rides, went to see lots of great sights, met new people, checked out potential jehtannis 
, etc. Just be open to sharing this time with them. Explain to your husband any concerns you have, but also remember that this is YOUR family too.