On our way to the airport we drove passed the disney hotels and they didn't seem to be walkable to the parks, well within a reasonable distance anyway. Our walk from the Fairfield Inn on Harbor was less than 10 minutes. Are the PP and DL hotels further away?

If you go to disneyland.com and towards the top, towards the right, there's a link for "map". Gives a popup with an interactive Flash map, and if you click on the DTD section, can give you a nicer view of the paths and such from PP and DLH. Well, in my opinion, at least, having walked from PP the WRONG way (so so long) and walking past PP from a further away hotel and going the RIGHT way (so much shorter). 