Long hair??

Get the split ends cut in the week before you go. Even straighten it the night before. Then, I'd style it in Two plaits or pigtails on either side of your head and perhaps ty them back whilst you're riding. Bandana on top and yeah. VERY low maintenece!

Nails??

Chop em short Just put a coat of clear nail polish on before you leave. Honestly do you really want nails painfully breaking and getting in the way of your fun?? I think not. They're gonna get grubby no matter what you do. So keep it simple.

Skin??

Dove soap and Sunscreen every morning and use the soap again at night. literally no maintenence.

If you desperatley need to feel feminine why not take your favourite perfume along and spritz it when you need to cool off. You'll smell great and it will cool you down. (alcohol evaporates much faster than water thus your perfume cools you down quicker) And wear PINK or soft pastels. I'll now refer you to the TE Catalogue. Just view it. ^_^

Simplicity and low maintenece is the key.