One would want a quality bicycle that is easy to ride, durable and will last a long while. Quality brand name bicycles would be in order, like Specialized, Rockey Mountain, Giant, Trek, Kona. But there are the long wheel base type bicycles that can hold more gear, like the Xtracycle. Then there is the Xtracycle Leap, an addon to a regular style bicycle. I remember Justin installed the kit onto his bike to go across Canada. Would add a ton more cargo holding capacity for tents, tarps, food, water, clothing and such.
Check this out out! Its massively long! Looks like a solid sturdy rear rack. Small rear wheel so it doesnt protrude above the top of the rack, neat! Might be too long for back country riding or single track. I would look for something similar, with a shorter wheelbase.
https://electricbikereview.com/xtracycle/edgerunner-10e/
This Kona Ute looks like the perfect length. Regular sitting position, a little longer then normal bicycle wheelbase, but the rack looks sturdy!
Big Picture: http://cargocycling.org/wp-content/uploads/2009/08/ute-1.jpg
Article: http://cargocycling.org/2009/08/kona-ute-big-manufacturer-enters-cargo-bicycle-market.html
^Sorry that was not really a good article. Just came with the search engine pic.
I would say find a frame similar to that, and install your own electric bicycle kit. From www.em3ev.com the MAC 1500W, with Sinewave controller, Cycle Analyst and one of their batteries.
Fabricate your own frame.
http://www.steves-workshop.co.uk/vehicles/cargobike/cargobikeindex.htm
Compact Cargo is the key term to look for, found this.
Yuba Boda Boda - https://www.hbl.org/shop/yuba-boda-boda-compact-cargo-bike/
http://rs.130928.mrsite.com/images/thumbs/0000000355375.jpeg
Chalo said:
Tour Easy is a venerable and much-copied design with long term credibility.