I've got 4 cats I take with me. My daughter and son-in-law previously owned my MH. He cut an opening on the bed frame close to the head of the bed large enough for the kitties to enter and go to the litter box under the bed. They also plugged in a soft night light so the kitties could see easier.
I use the Special Kitty Scoopable with baking soda and clean it first thing in the morning and the last thing at night before bedtime. It's unlikely, but if I detect any odors, I will sprinkle in more baking soda (from Dollar Tree...cheap). I add more Special Kitty as needed until the end of the month when I'll dump everything, wash the box with warm water and Dawn, dry, and start all over.
There's no way I'd get rid of or leave behind my little traveling companions...I love them too much.
Cat Lady
As you slide down the banister of life, may the splinters never point the wrong way.