Carrier pidgeon is about the only reliable communication
method under those criteria.

wrote in message
...
im an EE, but have never gotten into ham radio. Now, I have a reason!
Im going off roading in the california desert, and I'd like to be able
to communicate back home in San Diego. What band and equipment would
be the best (for both base and mobile) in order to communicate
reliably during the day? Or is this unreasonable?