My son is almost 1 and has only had my own food, I make then freeze all his meals. If i'm going out and will be feeding him shortly after going out i microwave his dinner for too long so that it is far too hot, by the time he eats it, it has cooled enough to be the right temp.
If its a while before he is going to be fed i take it out with me frozen and its more or less defrosted by meal time and only needs reheating. So far i haven't found anywhere that won't warm up his food. If i know there arent any food facilities where I'm going i make a picnic style dinner, some cheese, mini sandwich/ breadstick & soft cheese, rice cake, yoghurt or fruit pot, biscuit etc. I dont mind him having this type of meal once in a while but as i say that was if the food services were limited.
I found Asda cafe's to be excellent and debenhams.
hope this helps