ORIGINAL: bigbulls
I would get a pelican 17XX weapons case. There are three sizes to choose from. They are as indestructable as they come. They are sold as firearms cases but the foam inside comes as a solid piece and you cut to fit exactly what you are going to put in it. The two smaller sizes (1700 & 1720)are perfect for bows, quiver, arrows, releases, accessories, etc.... You can cut the foam so that everything you are going to put inside has its own place to go and doesn't rattle around inside.
Unconditional lifetime warranty.
http://pelican.com/cases_detail.php?Case=1700
http://pelican.com/cases_detail_specs.php?Case=1720
Are you sure a Dren would fit in there, with arrows and everything? Usually rifle cases are much skinnier than bow cases.