My Dad and I are going to be staying at the Grand Californian from January 24th-27th. I already checked and it looks like the Haunted Mansion is going to be down (my Dad is SO upset about that

), along with It's A Small World, and the SunWheel at DCA.
Has anyone been to Disneyland this late in January? Every trip I've ever taken to DL has been in May or June so these are some random questions I have...
- Are the animals still available to visit in the Big Thunder Ranch? [I

those goats]
- When I called last week to get a reservation with DVC points the CM said "we have availability everywhere." Should I assume the parks are going to be pretty empty?
- Are rides like Splash Mountain & Grizzly Run ok to ride that time of year? Or does it get too uncomfortably cool to get wet?
- What in the world kind of clothes should I pack? Everything I've read said that's the 'rainy season' but when I looked at the average rainfall for January over the years it's only like 4 inches. Ummm, we got 4 inches of rain TODAY in NJ.

Is that accurate or is it more rainy than that?
OK, that's all I can think of now.

Thanks.