Mobility Issues/Hotel Differences (Disneyland Hotel vs Grand Californian)

My partner and I are planning a trip to Disneyland. It's not our first time, but it is *my* first time since becoming disabled & losing significant mobility.

I really want to stay in the original Disneyland Hotel for the nostalgia (and the magical headboards. But my partner thinks we should stay at the Grand Californian for its closeness to the parks. We're not huge California Adventure fans, so I was wondering if it really makes a difference? Will we walk/roll that much more if we stay at the Disneyland Hotel over the Grand CA?

I will very likely be renting a length of stay wheelchair, if that makes any difference.

Any other tips/tricks or even just general opinions are greatly appreciated!