A long screwdriver or even jack handle can be used in a pinch, but since you've got such a long trip home why not take 15 minutes before you leave and run a length of 12 ga wire from the battery to a push button starter switch and another from the switch to the S terminal. I ran one into my car and mounted it under the dash while troubleshooting a intermittent starting problem (which turned out to be a bad connection in the solenoid new solenoid took care of problem). The switch was such a lifesaver I left it in place in case I ever need it again.