I got some pennies so I can make a comment.  The AAA says that the number
one problem on the road is electrics, followed by fuel.  If you are just
waiting around why not clean ALL your ground wire connections and make sure
the ends are tight and well grounded.  Then check the wire ends on anything
you can find to unplug.  Can't hurt, might help.
If turning the ignition key off and then on helps, why not just drive and
jiggle the key around in the ignition switch.  Maybe you got a bad
connection in there- mostly cheap plastic parts there.  If that is the case,
maybe you want to remove excess weight from the key ring- you know, like a
jillion keys, crescent wrench, and three kinds of can opener you got hanging
down.
ed- JMHO