Yes Chad, let the semps tell you where they are happiest. If you place them in different situations you will be able to observe which one do the best. Go with what they show you.
From there you are home free and have figured it out.
Don't water in the heat of the day, that will steam cook them. Do you get summer rains? If so you may not have to water at all once they get their roots established.
Mary that sound like a perfect spot for them. You might try bird netting over them until the roots take hold. Birds and rodents can be part of the problem, even earth worms can push the newly planted semps up. I've actually observed them do this.
