I'm going to have to disagree with DAJohnsonGymDawg on a few points. I have also done this for a couple years and at many different locations. And it really isn't hard once you have done it a few times. The very important points are:
As suggested get a good tripod (Radio shack has one for $35
RadioShack.com - Home Entertainment: Accessories: Antennas: Antenna accessories: Heavy-Duty 3-Foot Tripod Mount). Use a fence post for the mast. Alternatively you can use a bucket of concrete and a mast, but I like the tripod better. Make sure the mast is plumb (level). Use a buble level as already pointed out.
If you go with the Dish 500 or Dish 1000 (can see more than 1 satellite) set your skew at whatever it is suppoed to be for the zip code you are in and leave it alone. If you use the Dish 300 then you dont have to worry about the skew.
Set your elevation according to the zip code. You may need to adjust this a bit, to fine tune, but do this after you have done your best on the next step (azimuth).
Get a compass and aim acording to the azimuth for that zip code. When you are aiming make very very very small adjustments because it takes a couple seconds to register the change on the receiver. Once you get the best signal go back to your elevation and adjust up and down a point or so to fine tune.
Power: I used a car battery and inverter for a couple years, but they just don't have enough power for what I run. I run a 622 and 2 27 inch TVs (chaning one of the TVs to HD for the upcoming year) so I have a Honda generator:
Honda EU2000I Generator - Honda Super Quiet Generators
with the expanded gas tank so it will run at full load for about 20 hrs. It is not loud at all (only 59db at full load), you can stand right beside it and don't even hear it over the TV.
As far as cable runs distance isn't a big deal at all. I have used a 100' cable run with zero problems at all. I usually don't need that distance, but I have the 100' run because sometimes the dish needs to be that far away to fine a clear line of sight and when traveling to away games you never know exactly where you are going to be tailgating.
Also as far as using a DVR unit I totally disagree. They work great. I used a 942 for a few years and now I use a 622. Zero problems.
The most important thing of all is to practice a few times. Once you get the hang of it you'll be fine.
Let us know what else you need and we'll be happy to help. By the way, Go Vols!!!! 50 days until kickoff!