Try to tag along with someone who knows the area. 2 reasons. 1, folks love to show a new guy around. 2, it will maximize your time there if you don't spend half of it lost wandering around!
Keep a hoodie in the rig to. There's lots of times you will leave when its hot out in daylight wearing a tee shirt and think your going to be back by dark and you end up in the hills in the dark. It gets COLD when the sun goes down.
I dont think there is a better time to go for a first trip to the hammers. There is TONS of support for tools and repairs. Parts are usually no more than a day away.
Be prepared for dust!