Photography List Question

As I start making my photography list I am stuck on a couple combos. We are doing a destination wedding and thus only have 5 actually guests. This includes: FH mom and sister (his whole immediate family), my mom, sister, and aunt (missing one of my sisters and my dad). As I make the list I initially had us doing a photo with both moms (is this rude without my dad being there to have a photo?). I was also thinking of doing one with us and both of the sisters as a sibling shot, but again is this rude as my older sister won't be there? We are thinking about doing an at home reception in the summer and could do the shots then but will I miss not having them while we are there? I dont want anyone to be hurt...