Hey guys

I'm mildly freaking out!
My FH and his family and I are a different religion from my family. It's a destination wedding (sort of, I live out here in San Diego and family is from TX and UT) My FH and I are having a closed ceremony- there will only be the immediate family and two close friends there. I want to have a reception afterward, but there won't be many people there first off. I wanted something super small and intimate but mom thinks that there will be hard feelings with the family, since they're expecting something different than what I'm offering.
Sorry if I'm not explaining it very well, I just don't know what to do anymore!
Should I scrap a formal reception and just have a barbecue reception instead? That would be ideal for me and FH, but would the family be pissed, do you think? Help!!