Pittsburg isn't really close to much of anything so this may be a tough one.
Hopefully you can find someone that can do an inspection but you might think about contacting Pittsburg RV LLC and asking them to send a technician to do the inspection. It may cost some money but a professional, even if he isn't an AS expert, should be able to give you the peace of mind you are after.
You might also try and get a report though a service like this - https://www.instavin.com
I am not sure how reliable they are but I would invest $9.99 to see.
When you do make it down to Pittsburg, make sure and go to Los Pinos Ranch Winery - great setting and good food.