I love to hike in the Guadalupe Mtns, I live west in El Paso. Where exactly are you moving to?

If you will be hiking in the National Park don't bother with your fire starting kit. Fires are never allowed in the park. As mentioned above you need to carry all your water. Any water you may find(which none is reliable) is for the animals.

If you go north (in NM) and hike in the Guadalupe District of the Lincoln National forest you are allowed to make camp fires (if its not to dry that is) Water is still an issue and the only reliable source is Last Chance Canyon. If you get the topo at the National park it also covers a big section of the guadalupe mtns just north of the park.

You may end up getting a smaller day pack. 30L for the desert hike is pretty big, especially in summer.

Also don't see the need for 3 knives. Do you ever use all 3 on one trip. Would you be able to get by with one?

I agree on the the snake bite kit. Ive read multiple times it does more harm then good.

Ditch the Nalgene bottles.

Oh and get plenty of sunscreen.