Unguided retreat

If one wanted to do a 3 day to a one week unguided retreat what would they need to know? I am planning on doing this, with meals purchased and prepared by me in advance. The plan was 6 - 8 hours of sleep, meditation on awakening, yoga and a light breakfast, meditation, study of texts, meditation, light lunch, meditation, basic upkeep of the area, meditation, light dinner, meditation and repeat. Are there other aspects to the retreat that should be added?