taking my dog to spain any advice please

We went to the Costa Brava last September. We had a great holiday staying near the beach at Pals.  At the last minute we changed our mind and left our two Jack Russells at home. We were so pleased that we did. Dogs were not allowed on any of the beaches on the Costa Brava. We would have been unable to leave them in the caravan because the temperatures were far too hot. We had all the caravan windows and sky lights open all day and all night. If left there they would have jumped out of the window. We’d taken one dog on many trips around Europe in the past but we were so glad we left them at home on this occasion.