You are to be commended for taking the next step. You are doing a healthy thing by taking a few days away with the boys.
Oh there is a mighty big hole there. One you can't fill, but by doing things like you are planning for the weekend, you will slowly rebuild your lives around it, one step, one choice at a time.
My thoughts and prayers are with you and your family as you go through the many thoughts and feelings that may come your way.
And though some of them may surprise you, they are all normal so allow yourself to go through them.