Can tires go in with the other stuff or are they separate? If separate, is there a charge?

$2 off rim $4 on the rim and they have a seperate place.

Is yard debris free?

Separate for sure. As is garden debris, trash, appliances and automotive stuffs. I'd advise double checking the website.

Separate, go up to scale house

Separate and the tires are like 4 bucks for standard car truck tires and they go up in price as to the size in the tire.