Hi I have a question, My husband and I are moving from Cali to Florida and we are driving. My question is what do I have to do to make the ride for my cat as comfortable as possible? I have a soft carrier for her. What do I do about her using the bathroom? Do I take the litter box with me and should I leave her in the carrier or let her chill in the back seat? Please give me some tips. This is our first time driving with our cat. Thanks