Portugal Tolls etc

HI All,

Later this month we are heading Portugal for a stay at Turiscampo in Lagos-we are going via Santander and will be using the A2 and A22. 

At the moment the situation regarding tolls is, to say the least, confusing-especially as some roads, such as the A22, are exclusively charged via ANPR registering the cars details.

A general search brings up a number of options but none, such as registering a card so payments can be taken automatically, really appeal or are suitable for our trip.

CMC info takes me to a site that seems to suggest you can register your mobile and receive texts after the toll is incurred, which seems preferable to us, 

The third option seems to be using the toll roads and not worrying-not an option we would use!

So, if anyone has advice that would help, especially recent use of said roads but also general area info, that would be gratefully received!

Thanks.