I'd rent a Bearikade. They mail it to you and at the end of the trip you mail it back. Talk to them about the thru hike and they may cut you a deal.
looks like they offer a 50% discount on the rental, so it would cost 50 bucks however it costs 40 to ship it to me, so it's still 90 bucks - and then I'd have to pay to ship it back (although presumably I could do that from somewhere down there and it wouldn't be as expensive) :P
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