The initial plan was to head to the river in order to get away from the flames, however, this had not taken into account the idea that they were being chased. Now that we know there are pursuers, they would no doubt search the river, if they had not already blocked the path themselves, so sneaking could very easily backfire.
On the other hand, Orchis begins looking over the armored vehicle, silently calling Uno back to her and Camilla. Taking something this loud to the river would almost certainly make it there, but with little way across, it would also invariably result in being cornered once there. If Orchis had her full set of marionettes present, as opposed to a single Uno, it might have been feasible, as it is, getting cornered is as good as suicide.
However, the golems individually aren't that durable, and the vehicle itself is. Thus, Orchis would set Camilla to sit down by the Inn
"This won't take long, it looks like there's a change of plans. No way they've set the whole forest on fire, so we just have to get far enough away and you'll be safe."
with that said, Orchis would turn her full attention to the vehicle, not only examining the outside, but also reaching a hand within the hole so that her strings can extend from her fingertips in order to examine the inside, searching for any internal pieces that might be too damaged to hold up for long when the whole thing is up and running. Meanwhile, Orchis glances back to Uno
"I'll need you to stay down here with us, might need some pieces."
of course, if anything was heavily damaged or rusted, Orchis would move to take pieces of Uno in order to reshape and use them as replacements, she could even convert part of its power source into electricity in case the battery needs charging, and until the vehicle itself is fired up it would all be fairly quiet.
Considering how long it'll take to not only sneak through the village but also fix up a car I would suggest moving on without me tonight so the others can do enough for the timeline to somewhat make sense, as their actions are logically taking up less time than mine