If they are purchased bottles in their cartons you don't need to sanitize. If not, washing is acceptable. The issue is drying. They must be dry. Placing them in the oven at 200 degrees works great. I have stored boxes of honey frames in the freezer for a couple of months. Depending on the nectar source you can get crystallization so waiting a couple of months is not the best idea but it is better then not harvesting at all.
Edit:
If you extract it and don't bottle it try to keep it in the freezer.