Here is a link to a business that operates in most of the southern part of AZ and I have dealt with them when in Yuma. I don't know what auto dish you have but if it is Wineguard or MotoSat they are dealers for both and should be able to help you out.
Link:
http://www.azrvsatellitetv.com/
If you go to the Shaw Direct website you will find toll free numbers to call and you can likely take out a package from them while down there.
The LNB's are different for the different networks, and some change would have to be made there, however if you have Wineguard already that might not be too significant, perhaps the dish, arm and of course the LNB's.
We have Sat TV at our home and the Wineguard Auto installed on the roof of the fiver, we must have separate receivers since the home dish and LNB is different than that supplied by Wineguard. I have been told that Wineguard and it's LNB currently would not support the new Satellite, they are apparently working on that, but the other two will continue to be used or so I am told.
Dump the Bell and go with Shaw, according to my last conversation with them they will have another Sat on line sometime this year and they are not planning on changing their footprint as Bell did.
Gotta keep the GW happy, mine would be very upset now if she did not have her local programming and I might just want to watch a hockey game or two while down there.
Good luck