Which Hotel for Expo next August

[Flora Fan]

My sister and I are making plans to go to the Expo at the convention center next August. I want to stay on my DVC points, but think it would be best to reserve a hotel room as a back up (just in case the DVC doesn't work out).

We are on a tight budget, what hotel would you recommend within walking distance of the convention center and the parks?

Thanks in advance for the help.