The advice received on this forum has been terrific and most convincing not to tow the 31 footer the hundred miles or so without proper gear.
Well, as luck would have it, the seller lives no more than 20 miles from Inland RV the Airstream specialist in Corona! He has agreed to deliver the Airstream there where I will have the wd hitch installed. I will drive to Inland RV after having already had the brake controller installed on my Excursion here in San Diego.
I think that it could be a pretty seamless process and certainly a heck of a lot safer....might just have Inland repack the wheel bearings as well!
Thanks again all for the advice. Once I get the
Sovereign home, I will take photos and load them on the site here.
Best,
JB