I meant a map that you could access throughout the entire game - but looking over the walkthrough, it doesn't appear to be that way. There are maps scattered throughout the game, I can see that, but it may be that the maps are only available at each individual location.
There are those maps that you can print out from the walkthrough, though, and that's way better than nothing.
If you load up a previous saved game, you will have in inventory all the items you had up to that point. That is why if you do go that route, don't delete any of your most recent saved games, or you would have to re-do part of the game. I don't know how many saved games this game allows, but if possible, I would not delete any saved games you have already made, unless they were saves you made very early on in the game. If you just travel back to a previous area without loading up a previous save, you won't lose any items you have currently.