If you want to go green with nappies(at least semi, no disposables are all that great, but at least partially sustainable resource and partially biodegradable), I use Moltex, and have had very little leakage issues that I had with previous brands (pampers, and some other eco brand I can't remember).
Sephy went through a phase of leaking through a lot, before I switched to Moltex, and I considered all kinds of things like using a cloth nappy over disposable nappies and things like that. Now she sleeps on her tummy all the time (can't stop her, still considering velcro-ing her on her back...), she wets through more again as well cos nappies just aren't designed to work that way up :p So good luck if Elsa becomes a tummy sleeper!
But then, I'm also lazy and often leave Sephy in the one nappy overnight, or just one change middle of the night, so if Moltex can manage that, it might be ok for your wiggle-baby.
I'm getting Sephy in cloth nappies as much as possible now but still not game to put her in them for night time! Middle of the night clothing/bedding changes are the worst. I feel for ya!