How many days should we plan on visiting Disneyland on our week long vacation?

I highly suggest 3 days To cover everything,, (Almost) Have fun

Yup 2-3 unless you ask my wife. She would live there..

2 to 3.. so you can also visit the california adventure park..

At least two if you want to enjoy most of the park

That depends on your stamina I guess, as well as the chosen days and the park hours and how full it will be. Absolute bare minimum would be 2 days, for long hours and high stamina, but 3 or up to 4 if the hours are short, it's busy, or you need to take a lot of breaks.

Agree, at least 3 days