I got a deal on a Pelican 1660 Case, and not to spoil my upcoming project, I am going to make a BOB (blow out box) out of it. Two of these may do you well and its sexier than a wooden box
See specs:
1660 Case
Interior Dimensions:
28.18" x 19.75" x 17.62" (71.5 x 50.1 x 44.7 cm)
* Watertight, crushproof, and dust proof
* Easy open Double Throw latches
* Open cell core with solid wall design - strong, light weight
* O-ring seal
* Automatic Pressure Equalization Valve
* Large 2-person fold down handles
* Stainless steel hardware and padlock protectors
* 3 level Pick 'N' Pluck™ with convoluted lid foam
* Personalized nameplate service available
* Unconditional Lifetime Guarantee of Excellence
* Retractable extension handle
* 4 strong polyurethane wheels with stainless steel bearings
What ever you do, plan for the worst and make sure you can move it by yourself.