Sam did everything he can. If he had more time, he would have made more preparations that are not as superficial and can give him actual help.
After all, even now only Raunak is trying to help out a bit by increasing the guards near the cane fields which is the most he can do for now.
As for anything more than that, it is hard for even him as his main field of work is within the business sector and he cannot involve himself too much in the town safety.
While the group is worried about what is happening, some people entered the town one by one. Most of them are elves and there are some centaurs. The Centaurs have separate restaurants where they can sit and eat as horses do.
They don't get to transform into human forms like Nagas until they broke through the consummate realm.