If your resource activity is something a sub can do and you will have a sub, keep your activity. The main office staff will print out attendance for the sub for your resource period.
If your activity is something a sub cannot do, you can delete it, but you must do so BEFORE midnight for the kids to be redistributed to other rooms. If it is after midnight and you are unable to delete, the sub can run a study hall in your room. Students also can ask to be plus added by another teacher if they wish.