So I've got my first stay at a Hilton family hotel tomorrow since signing up for this promo, a cheap advance purchase rate. I also signed up for the 1000 HH bonus points per night but suspect I cannot do both, that's if my stay is eligible for 3x bmi miles. Or am I wrong on this front?

It seems pretty lousy for the emails to be so clear cut with the triple miles language and then make it damn hard to get anything from it.