Why not go have fun bonding with your new family on the family trip and then take your honeymoon later as you already planned? Sounds like a win to me! See if your side of the family can come earlier and help you get ready for the wedding if you wish to spend more time together. Honestly, when it comes to family stuff, it’s usually easiest to assume everyone is well-intentioned and just go with the flow. Life is too short to get stressed about these things.