Only thing i can think of for your labour bag is you camera, spare batteries, heat pack and as for labouring nude, i didnt wanna do it either so i wore a short nightie, covered the top half of me and went to just above my knees, i will def labour again in it, easy to slip on and off (especially handy when your getting in and out of showers or baths)

And btw you can never be to early to pack your bags, i havent done mine yet but thats only cause im waiting to get the suitcase off my mum. lol