Another vote for Action Packers.
I have used different sizes for different activities, the 8 Gallon for use as a range box....
http://www.google.com/products/catalog?q=rubbermaid+action+packer+8+gallon&rls=com.microsoft:en-us&oe=UTF-8&startIndex=&startPage=1&um=1&ie=UTF-8&tbm=shop&cid=13554165999931196291&sa=X&ei=uhJGTsLLF-yOsAKl74mSCA&ved=0CDQQ8gIwAA#
I use 3 of these. One for my tool box in my car, one for target range box, one for my 3 Gun gear.
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The 35 Gallon for campipng gear..
http://www.walmart.com/ip/Rubbermaid-35-Gallon-Action-Packer/879603
These are managable, can be carried by one person depending on the weight, can be stacked, I like the way the lid has an overlapping feature with the box, not waterproof, but water resistant.
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The 24 Gallon for misc camping and gun gear....
http://www.sears.com/shc/s/p_10153_12605_SPM3030181702P?blockNo=9&blockType=G9&prdNo=9&i_cntr=1313215327277
A little on the short end.
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The 48 Gallon one is HUGE, I do not own one of these
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SMSP