Have you thought about bringing toiletries with multiple uses? I’ve mentioned before that baby shampoo doubles as laundry detergent. You can also find shampoo and conditioner in one. Use a lotion that doubles as your sunscreen to save room.
If you still concerned about room, take a look at the new shampoo, soap, and laundry detergent sheets. I haven’t used them but am going to investigate their use…stay tuned. If they work, they would really be a huge space saver. Plus, you wouldn’t need to worry about having them in your one quart plastic bag for TSA to inspect. They aren’t liquid!