Zodi Instant Hot Shower--US$160
Worst thing about camping? The lack of convenient hot showers, hands down. Fix that with [[xref:http://www.zodi.com/Consumer/zodihottaptravelshower.html|Zodi's instant hot shower|Zodi instant hot shower]] kit, which is propane heated and battery pumped (four D cells needed). It costs US$160.
The 4-gallon tank provides enough heated water for a 10-minute shower. The next person has to fill it up again and start over. One propane tank and one set of batteries should provide 60 gallons of hot water before they need to be replaced. Ahhhhh!