Congratulations on your find and purchase. I'm sure you'll have many happy trips to talk about.
Speaking of happy trips I hope keep them all safe by making sure you drive a whole lot slower than the 80 mph you caught yourself going. California towing law is maximum 55mph and is posted on all freeways, plus a few other places. Trailer tires
, which you probably should replace, typically have a 65 mph maximum speed rating. Look for the date code on the tires
, if they are over 5 or 6 years old no matter what the tread looks like it's time to new tires
Happy Camping and be safe.