These are fairly long 'rounds' of undeterminate lenght.
Yes a ritual can be conducted during that time as your action if the context of the challenge is right. Right now, you are static so it is perfectly acceptable. If at some point in a challenge it is obvious that you are on the move (a chase, for example), than common sense dictate that you can't use a ritual.
You carry some components on you and, being the clever heroes that you are, you always happen to have the right one on hand.
Since there isn't much more than 2 occasions to conduct a ritual in the whole 'Day', it isn't much of a stretch.
Yes, the option include looking around in the farm; that's why perception is a primary skill!
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Velmont is touring Spain for his vacation in the next two weeks. Since there is such a thing as an internet cafe, he may posts on occasion. But for the duration, whenever everyone has acted but him, I will run him.