I never wear makeup, nailpolish, etc., but I do have long hair so I can sympathize with where you are coming from. No, you do not have to cut it off, but you need to experiment to see what beauty products are essential to make it worth toting all over on your self-supported trip. Initially our idea was to just carry a small container of that general purpose camping soap you can use from everything, hair, body, clothes, etc. But that left my hair like straw. So instead, by hairdresser gave me small packets of samples of a great shampoo/conditioner, and then I took a small tube of a leave in conditioner which does wonders for my hair (again I tried not using it and my hair looked like straw). It didn't take a lot of room but was worth its weight in extra cycling effort. I also packed a few skirts for off bike stuff, but then it was much colder than I expected, so at night I would layer everything I brought with me from cyling arm and leg warmers to a couple skirts to stay warm! In retrospect the skirts were silly, just a pair of pants would have served me better, but if the weather is warm where you are going a terry skort is also small and nice. The best thing worth taking though, was a silk double sleeping sack, makes even questionable bedding cozy, and packs up real small and light.