Go in the pretty doors, walk a milli-moment, turn left, take the small, insignificant doorway that leads to a long hall.
I still haven't found White Water Snacks, but I figured out the "go in, turn left, unimportant doorway" thing about 2 full days into our December trip, LOL (after going the long long way from PP for our 4 night stay there in Sept).
"I guess I am really confused on if I walk across the street and up towards DL, can I get to DTD that way or is that just the gates to DL and CA,"
Yes. See map (there are better, but this is incredibly basic for me being incredibly basic):
http://www.geocities.com/ashpsyche/DisneylandLinkMap.html
Leave HJ, walk down Harbor, cross Harbor (or cross and walk down Harbor, LOL, you have a choice of intersections to cross Harbor), walk on sidewalk where shuttles and such pull in (labeled Entrance Plaza) , go through bag check, get into esplanade. To your right is DL. To your left is DCA. Sigh in happiness b/c you'll be there soon. Go across esplanade to the exit area of the bag check on the opposite side, enter DTD.
It's so much easier when you're actually there. (then again should you trust a person who thought she was going the fast way from PP to bag check, when she oh so was not for an entire visit?

)