For both city trips and hiking trips I take the following.
*camera Canon 30D ( easily works for 2 weeks on 1 battery)
*phone (plain old SE) (if not on, can easily work 2 weeks)
*garmin gpsmap 60cx (eats batteries)
*led flashlight ( 2 weeks as well)
nothing more. It don't want to be busy looking for places to charge batteries during my holiday.