i have been thinking lately about getting a custom rear bumper fabbed up; i would like to be able to store 4 jerry cans back there, 2 for water 2 for gas so i dont have to purchase a roofrack and deal with the downsides (mpg, noise etc). Do you think 10Gals of each is overkill? Perhaps just 1 5gal of each is necessary
problem is it would all have to swing away to allow access to the rear
does anyone make something like that for the 1stgen or am i looking at going custom?
This guy makes one for a 1st gen, based out of GA... $670
http://www.kenmtn.com/html/multi-carrier.html
Personally, I'd rather have a swing away on each side to split up the weight and require less clearance behind the truck to get in. Plus you can easily make a fold-down panel on each side to use as a work space/countertop, and mount recovery tools there instead.
If you had a Kaymar bumper like LaOutback mentioned, you could just add this to it:
http://www.expeditionportal.com/forum/attachment.php?attachmentid=43969&d=1278975484
or you could probably pay this guy a pretty penny to fab one:
http://www.ultimateyota.com/smf/index.php?topic=8072.0
Not sure if 10 gallons of each is overkill...you'll use it at some point I guess. It depends on how far off the main roads you're going, how long you plan on being there, and how conservative your demands are. Just keep in mind: water weighs about 8.34 lbs per gallon and gasoline weighs about 6.15 lbs per gallon (depending on temp/atmospheric psi) so you're looking at around 80lbs of water and 60lbs of fuel (I know that's not exact, I guesstimate:drool

140lbs plus your spare will be heavy so you may want to put the water inside.
I keep a few 10L MSR dromedary bags distributed thru out the inside my rig, at the lowest points. I like them because they're compact, multi-use (shower bag & backpack water bladder), take a beating, and the fact that it's split up into several bags makes it ghetto-baffled storage. You can even freeze the bags with no problems. Too bad they're $45 each