If you follow the same routine, temps and substrate should remain unchanged. For my chart, I keep track of weight, date fed, date shed, date that I last cleaned her cage and any times she may have refused to eat. Feces and urates would only be significant in noting dehydration/constipation, but if your husbandry is correct, you shouldn't have to worry about those either as your snakes will go when they want to goI'm not familiar with switching substrate (since I use strictly sphagnum moss), but seems like a good idea if you're going through the effort.