Backpack diaper bag for travel

Erica

So I'm traveling with my 10 month old daughter next month from Minnesota to Florida (some of you have seen my previous posts) and I already have an Eddie bauer backpack diaper bag from Target, but I feel it's not big enough and the top strap has broken. I've seen an Ergobaby backpack diaper bag I'm thinking of getting. Have any of you had one like this? Reviews? Advice?