if i was making beer on the road i'd want simplicity and speed. use malt extract for sure, no equipment needed other than a big pot to boil in and a bucket or bottle to ferment in, so something like this
http://www.midwestsupplies.com/amber-malt-extract-syrup-maillard-malts.html
or this
http://www.midwestsupplies.com/munton-and-fison-uk-amber-dme.html (DME easier for storage) and some hops and yeast
something like this for the water
http://www.walmart.com/ip/WATER-2GO-SPRGWTR-1LTR/32527920
then keep the bottles clean and use for finished product without additional cleaning. can be reused to save money next time.
you can get the fermenting over with in about 7 days if you keep it warm so on cold days your could stuff warming pads of some kind inside an insulating blaket to keep it moving along.
then if you use finings (or a filter) you can clear it in about 4-5 days (colder the better so long as its not freezing).
once it in the bottles, its no big deal shaking it around. so if you are camped up in a dispersed area for 14 days straight, i'd say no problem so long as you can keep the temperature under control.
i make beer now in Thailand so its all about temperature control here.
best part, even with the bottled water its only about $35 for 5 gallons, more like $25 if you filter and boil local water
alternately to using bottles, a keg, but they are expensive, need cleaning and take up a lot of space. i think the plastic bottles are the way to go.