[I try. My limits are pretty much self-defined but I put a lot of thought into defining them.]
[I guess I'd mostly be worried that you know how minds work but not how souls work and something would be messed up if one of us went all the way asleep. Book was able to move out okay but he was always the most able to fade back and not pay attention.]
[A valid concern. I've never been sure that there was a meaningful difference between a mind and a soul myself, but--unsurety goes both ways.]
[So how do you want to do this? We can put our arms around your waist and you can put yours around our neck, or you could cling to our back, or we could try to rig you some kind of harness for flying in.]
[We do have non-irrelevant quantities of metal on hand, we can secure you using that, too, regardless of whatever else; mostly the "harness" option was because some people just plain dislike physical contact.]
[Just checking.] Quicksilver rivulets of metal probably not identifiable to people without considerable metallurgical knowledge or some variety of cheating snake their way out of the dufflebag.
They're pretty much going to hang in the air until the two bodies are holding onto each other enough to secure.
And the various pieces of metal wrap around all four of them in various places, joining with their other ends and solidifying.
Yep! They start off slowly, but they'll start picking up speed once they're well above the treeline.
...The slowdown is considerably sharper, as civilization looms beneath.
[Okay, now we need to find a petstore, which means looking one up, which means using the internet, which means explaining the internet. So there are these devices called computers that can talk to each other--not literally talking, they're not people. But if you have one then you can connect it to a network that lets it access information stored in much bigger ones...somewhere else. And these have any number of useful and entertaining things stored thereon, including in this case directories for businesses in any given city.]