Thanks for the link. I was going to make up a map that looked like this. I think the red line is just to the left of the crosswalk, but close enough. My dd & her friends have been to a few Anime conventions and walked to DL afterwards. The convention center is right next to the Marriott, so the walk isn't that much farther. There is a big crosswalk, and I would say that guests staying at the Marriott, the Hilton, & the Anabella would use this crosswalk, and go through the arched entrance to the parking lot & to the esplanade from there. To go to Downtown Disney you'd go along Katella & turn right at Disney Drive, & go through the Grand Californian (at least, that is the route my dd took to meet up with us at Tortilla Jos.
If you're used to walking then it really isn't that much of a walk. I see a lot of people walking back to that hotel & even the Clarion after a day at DL.