Ubco is a New Zealand company that is developing an electric utility bike. It's called the 2x2 because both wheels are equipped with electric motors. Range is reported to be about 60 miles on a charge, but I'd be a little bit skeptical about that. Load capacity is 200 kg / 440 lb (including rider). Could make a nice machine to take along as a dinghy for your ExPo truck.
www.ubco.com
View attachment 300377
Short video here
https://vimeo.com/125858743
www.ubco.com
View attachment 300377
Short video here
https://vimeo.com/125858743