FILs have offered to host the rehearsal dinner, which is awesome. FMIL was talking with my mom about it, and it seems they have differing ideas of who all should be invited. Traditionally, I've usually only gone to rehearsal dinners if I was in the WP, which is what my mom thought also. However, FMIL wanted to invite all OOT family. As much as I LOVE that idea, my mom and I don't want to significantly burden FILs, as my side of the family is about 60-70 people.
It could be a cultural difference, as I grew up in the Midwest US and FI's family is from the Southern US. I know either way, WP and our immediate families need to be invited. Are there any other etiquette rules, or just as many people as FIL's budget will allow? Is it too...over the top...to invite all OOT family? I'm not sure that all of them would attend but as we're dispersed all over they might appreciate the extra time spent together.