My lovely parents purchased me a backpack for Christmas two years ago. It is a 60L Gregory, Deva backpacking bag. It's designed for women so it has nice cushy shoulder straps and waist belt. It's also water-resistant.
What's in it:
1 pair linen pants
1 pair bermuda shorts
1 linen skirt
6 T-Shirts - 2 quick dry
2 Tank tops
1 Long Sleeve Shirt
1 Fleece Sweater
1 Rain/Wind Jacket
5 Socks
7 Underwear
2 Bras
1 Hat
1 PJ Shorts
1 First Aid Kit - Polysporain, Band Aids, After-bite, pain killers, decongestants, Imodeium