You Know What Guy?
It almost doesn't matter.
Just get the paperwork from each and read them throughly.
In 15 years and 70Kmiles+, we have needed help just twice. If you are in a state that has a AAA presence and you have RV+, they are as good as any other. None of them own the service/two trucks, they contract with local companies.
FMCA has a road service plan, so does Coachnet and Good Sams. You have to read the fine print. If you can change a tire on your own or keep track of your fuel inventory, then there is not much need.
If anything happens, it is going to cost you money. That is why towing is a big issue. Your insurance may offer towing.
Matt