I'm not hating on you. I'm stating simple facts.

No matter how "tame" it is, it is not domesticated. Strange people, loud noises, unfamiliar scents, and being out of its territory in broad daylight are a recipe for disaster when it comes to wild - and that is non-domesticated, which means exotic - animals.

I'm asking you to consider the animal's safety before you consider your own fun. That law enforcement will kill the animal before capturing it is something you really want to risk? Even with a collar, a leash, and a little bow attached?

I'm sure it's leash trained. I'm sure it does well in its home territory. But you said your sister is visiting, and this is bound to be stressful for the animal.

Stressed cats react by attacking irritating stimulus.

Ocelots are wild animals and their behavior cannot be reliably predicted.

Like I said, I know you're not stupid, so don't be stupid.

EDIT: And I'd like to make it clear also that I 100% believe the ocelot is a precious rubby baby and a sweet kitten -- in its home territory, where it feels safe enough to open up. Small wild cats are natural climbers and hiders; if you bring a small exotic cat out of its territory, into broad daylight, surrounded by unfamiliar sights and smells, with people being loud all around it, it's not going to be comfortable for the animal! I'd love to see more gentle, happy exotic cats being shown off to people in public, but sadly, it's simply not the typical reaction.

Again, if you do it anyways, you need to make sure the cat is comfortable. If you are determined, then you should bring a small dark crate that the cat has shown willingness to hide inside of before. Animals backed into corners and surrounded by predators (such as unfamiliar people) are not safe to be around. Don't make your cat want to bolt, strike out, or run and hide, and if it does want to run and hide, give it somewhere safe to retreat to.

I just don't want to see the cat hurt, dude. I don't want to read about you guys on the news and see the ocelot was harmed, or someone else was harmed. You have to consider that any exotic cat is a spokesmeow for EVERY exotic cat, and that includes servals, bobcats, savannah cats, etc. If something goes wrong, lawmakers will notice. Ocelots aren't on best terms with ownership in WA, and if something happens, the laws may get tightened and some exotic cats may lose their homes and have to be surrendered. You have to realize that your sister's cat is an ambassador, and you have to be so, so careful both that it doesn't get hurt, and that it doesn't cause a scene and cause important people to think it's unsafe to have exotic pets.