Hi! There are several options here...we've tried the following:
1. prefold cotton diaper folded in half held in place with a diaper belt (you'll instantly know when LO is wet); on the legs: Rock-a-Thigh Baby makes incredible long baby socks that are warm, recycled yarn, stay-up; Hank & JoJo's make cute long socks too that are thinner but stay up really well and cover the legs and thighs, depending on the size you get.
2. split-crotch pants with a prefold cotton diaper held sumo-style (like above) over them; we also put a diaper cover with folded prefold inside it on top of the split-crotchers for camping trips. Worked great.
3. I used to (when DS was littler) use long socks (the two brands in #1 above) underneath babylegs leg warmers...the layering was great at staying in place, not losing pieces, and I could use whatever (if anything) on the bum.
4. naked bottomed with #3....and make a soaking pad layer to lay baby over...100% wool felt, towel, blanket, prefold...whatever you like!
5. yes, cut off the feet of long kids' socks and you've got leg warmers.
6. cut the crotch out of a pair of baby tights. put whatever you want over them.
Hope these ideas help you generate something useful! :)
Andrea
EC Simplified
Follow Mothering