Iron supplements are given only when it is medically indicated. Normally requirements are met by breast milk upto 6 months and after that breast milk is not sufficient so need to wean baby with variety of food available from family pot. Means give minced purees of various fruits. Rice pudding, semolina pudding without much
sugar and salt.
Vitamin A is found in mango, carrots, pumpkins. And yes you can give cerelac when traveling just make sure it is made with sterile method.