I have been very happy with Coach-Net. I had them for 10 years, used them 3 times and they've been very responsive to my needs. They will put you on the phone with a tech(?) who will try to help you work through your problem. They will send a qualified towing service if needed an I believe they tow to the nearest qualified repair facility, not just the nearest fix it shop.
They towed my 37' DP 95 miles and it didn't cost me a penny. They have 2 or 3 plans and will cover your cars also. Prices aren't bad at all.
Alpine Coach........That's how Jaguar would've done it!