Kenneth,
I said "And, if you have a link to an online schematic, that would save the rest of us some time.", when I meant to say "data sheet" for the new P/N FET!
Vgs is a condition, not a characteristic of the device. The -1V figure "could" be a breakdown voltage, the voltage where the drain current hits a particular number, or ???
On all of your FET circuits, you want to be sure that the maximum Vgs ratings cannot be exceeded. While you are messing with the part on the bench, a zener soldered across the part's leads is often a good idea.
You might want to add a capacitor to hold the power on briefly after the manual switch is actuated, to give the arduino time to wake up. To avoid having to hold the switch for seconds.
Ted