We want to drive from Barcelona to Cadaques, figueres and Montserrat, then head south and eventually drop the car in Gibraltar. Any suggestions when travelling south. We would like to see Valencia, Seville
Check to see what drop-off fees are in Gibraltar, could be expensive as it’s a foreign country to Spain.
If you wish to end in Gibraltar, drop the car at the Spanish town the borders Gibraltar. I believe the town is La linea. Walk across to your destination.
As previously stated, you will almost certainly be required to drop the car in an underground parking garage in La Linea which has an arrangement with the major rental companies.
The rental companies have small desks/office either at the airport or in La Linea near the border.
From the carpark it is a five/ten minute walk to the border and the airport.
Is there a reason you want to drop the car in Gib?
It will mean backtracking from Seville.
En route, Tarragona and Cartagena are worth a one night stop. Malaga two nights.
I lived near Gibraltar for 12 years, and have done the Barcelona/Gib drive you are planning and also often from Gib to Seville and beyond. Never heard of the attacks described. Of course, things might have changed since then.
I understand the "vehicle crime" discussion, but we drove extensively in Spain this summer and saw absolutely no evidence of elevated risk. Spanish roads were quite good, and fuel was significantly cheaper than in France. Spain was a revelation to us, as the economy is jumping and lots of construction is underway.