Is it still a good idea to go if its raining?

Yes, if you like the mud because you're not driving on a paved road. You should also make sure to call ahead to see if the weather will affect park hours.

I'd say yes

No o don't think so because they have a feeding zoo an you won't be able to feed the animals because you must stand outside in order to do so

Must of the time they are still open and the animals will come up to the cars. Just call to make sure it's not so bad they closed.