you go from Barcelona south along the coast for an hour to Tarragona, (the easiest and cheapest tolls route is to get on the ronda litoral going past Montjuic on your right. keep left at every possible junction and you pass "porta de barcelona" services. pay the toll. after Penedès DON'T TURN OFF TOWARDS LLEIDA and after an hour you get to Tarragona)
Turn off the AP-7 payroad after Tarragona towards Reus airport, jct 34. You go on a dual carriageway towards Reus then follow signs to ALCAÑIZ. After about 10 mins on the dual carriageway, T-11, it goes single lane and is now the N420. keep going on this road for an hour. you cross the lovely rio ebro, then Corbrera, then Gandesa,
then you pass a turn off to the left to Caseres. Start paying attention now! Cross the bridge, enter the state of Aragon, and turn off to the left immediately after the bridge (be careful - the road markings say you can't do this).
Take the right hand track (not over the little bridge). Keep left then after a few minutes fork down and left. Follow the track down and up and round to the right, then a bit further on after a left bend you arrive at boodaville. park next to the rubbish area perlease.
oh, you wanted a google map link with supermarkets and nearby towns also marked?