" Either one says that the list is not complete. Both makes it redundant. I always put a comma before "such as" -- it may be acceptable to omit it, but as a matter of style, I prefer it.
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GoodmanYou can carry out many activities during the tour, such as trekking, yatching, fishing, and so on.As Barbara said earlier, after 'such as', 'and so on' should be omitted.