Multiple cats in travel trailer full time

Code2high, I will pass your advise on..Thank You. I think 13 animals in a trailer is too much, no matter how you rig it. But since they are determined to make this potentially disastrous mistake, I thought I would get some info, ideas from folks who do Rv with pets,because we have never traveled in an RV with pets before. I do not know enough abt. animal hoarding to say if that is the case here. Their cats are fixed, thank goodness. I just foresee many potential health concerns for the animals and the people. Also I fear they will get out here only to be homeless because I really doubt the campgrounds and RV parks will let them stay, because 13 pets is just plain excessive given the circumstances. Thanks to all for your responses. Hopefully, all will be well.