Think of the Disneyland Resort and Walt Disney World as two completely different entities, as they are in many respects.
That includes ticketing - DL tickets will not work with WDWs turnstiles.
However, i have heard in the past that you CAN *trade in* your DL ticket at a Guest Relations counter for a 1-Park WDW ticket, and vise versa.
I few years back i looked into this but decided *trading in* my more expensive WDW ticket for a DL one was not worth it.
This policy may well have changed now, but you can always ask at a non-Park located Guest Relations once you arrive at WDW.
Try the one at DTD, or any GR counter at a WDW Resort hotel.
They will be able to tell you the current policy.
You might even be able to call ahead and ask before arrival.
It is probably best you just buy the days you need for both Parks separately.
To save a little money on those, Undercover Tourist. com may be able to help you out.
This is a trustworthy, authorized ticket seller for several Florida-based Theme Parks.
You will receive brand new current tickets at a discount mailed directly to you.
Hope this helps you out a little !
