Is there a biblical reason to limit information about creation to Genesis? Here's a debate between Hugh Ross of "Reasons to Believe" and Ken Ham.  These men are popular spokesmen for each of Old Earth and Young Earth Creationism, respectively. In the hour-long discussion, Ken repeatedly shuts down any use of passages other than Genesis to get information about the details of creation. For example, he didn't want to talk about how Job (9:8) or Psalms (104:2) speak of God "stretching the heavens" 

Setting aside the whole YEC/OEC debate for the moment, is there a biblical reason to limit creation-detail information to the book of Genesis?
There is no reason to limit information about the creation week to Genesis, but...

1) There are a number of good reasons to limit information about the creation week to Scripture. For instance, philosophically, the word of God is truth, and all men are corrupt and limited, which makes the revealed word of God the only reliable source for truth.

2) There is good reason to give preference to historical narrative over image-rich, emotional songs, etc. If it is a psalm, its purpose may be to praise God, but may not be to relay historical information about the creation week in a straightforward and sequential manner. (See, for example, Psalm 6:6)

3) Whenever you interpret Scripture, it is always wise to consider the purpose of the passage in question. Genesis 1 is the only passage in Scripture whose primary purpose is clearly to provide information about the creation week.

4) There is good reason to believe that most (if not all) of the information about the creation week that appears subsequent to the first two chapters of Genesis is based on the first two chapters of Genesis.

For these reasons, Genesis can easily be regarded as the best source of information about the creation week, and is certainly the first place I would go in studying the topic.