When you enter wilderness areas, do not think about fast rescue, cell phones are not working, and you may not meet anybody for a few days. If you die, leave somewhere some identification, so the forest administration can send back your remains to your family. . . . Oooops, seriously, it is a safety rule to at least leave your name and coordinates when you enter wilderness; rangers do not check the registration books every day, but they can quickly see if somebody is reported missing if he is in the area or not, so register also when going out . Registration helps also rangers to make statistics, study how many people go on the trail, what time, what season, etc, but most important is safety.
A bit more on your list:
A minimum safety kit including analgesic bandages, (morphine, if you are not alone) which I did not need, but again, you never know. Think about how much food you will need; note that on trek, you use lots of energy, and often, because you are tired you do not feel hungry, but you must eat (and drink).
I can recommend 3 contacts to the area whom I wrote before leaving for the Wild West:
Pinedale Ranger station:
Pinedale Ranger Station
Bridger-Teton National Forest
307.367.5733 direct line
Where you find contacts (mail, email, telephone) to the rangers of the area. They are very well informed about trail conditions and weather.
Sublette county tourism board.
I got answers for specific inquiries (weather, bears, technical difficulties. . . .) and general information about my proposed trek; very helpful and informative, despite a bit “touristy”. The good thing is they all warned me, but no one tried to discourage me from a trek in October; they all warned about bears snow and blizzard.
I will not give a lot of advice as interested trekkers already know what they need, usually, and I will not give a trekking course; I just can tell the Earthwalk map is a very good one, it is even waterproof! So, easy to carry in a side picket of the pants. Knowing where you are when trekking is vital!
No real advice about warning and dangers or so; rangers, wardens in the area have the best information and advice about treks in the area; physical condition is a minimum to think about; altitude (AMS, Acute Mountain Sickness) is generally not a problem up to 3000m. I spent 20 minutes of my life above 4650 m, I am not qualified to write more about (but I red a lot). Let’s keep serious, you need maps:
USGS (http://store.usgs.gov/scripts/wgate/zww2036360da7/~flN0YXRlPTk4NjcuMDAxLjAzLjA2====?~okcode=GSHP&~target=_top&~forcetarget=yes), which can be purchased on Internet.
Ice axe, crampons, (I did not use, but you never know. . . . . ) compass, binoculars, headlamp, cooking gear, etc, etc, all that sort of things. . . see websites for details. Important is the equipment must be LIGHT and of best possible quality (CHEAP EQUIPMENT IS DANGEROUS EQUIPMENT). If you go out on snowy weather condition you will need good equipment, it is seriously a matter of life or death; warm clothes and a low temperature rated sleeping bag are compulsory.
The famous bear spray; using instructions are on the container, read them carefully and have it handy (in a special carrying device, or in a side pocket of your pant).
All this is only my opinion, you do as you want, at the end.
And at last, don’t do it like me, don’t trek alone in wilderness (haha, I do not want to have a death on my conscience), I write this seriously, but now everybody is free to do what and how he wants, and many people enjoy to trek in small parties. . . .
This could also be a "Packing list " tip.
More in next tip, with useful contacts