There is a lot of useful information on the web about towing ASs in particular and towing in general. When we bought our ASs a couple of months ago, even though I've towed a lot in the past, I found it a useful review and beneficial for the co-pilot/navigator who has never towed. An example:
New tires is a good start. By the DOT code on ours one them could have been original.
In no particular order ...
Not sure what you're towing with, but a brake controller will allow you to adjust the braking so that the TV isn't doing the majority of the work.
The 7 pin cable may or may not be wired the same as your tow vehicle, but you'll need those trailer lights and electric trailer brakes.
Trailer and truck both level once hooked up is the ideal.
You can check the brakes for function by getting a wheel in the air, disengage the breakaway switch and try to rotate the wheel - it should not. You could also adjust the brakes at this time.
Repacking the wheel bearings is a good idea, but not necessarily absolutely needed.
Wind may or may not be a problem based on TV and/or hitch.
Take it easy.
Others will offer more ...