L.R.
K.-My little one (10 months) is formula fed too. I found it VERY helpful to carry a thermos of water so that I didn't have to find a place to warm up a bottle. Also-there are single packets of formula ( I think they come in 4 oz packets) that are also very helpful-however, they are a bit more expensive. If you have a bottle warmer-those are nice for hotels but again, the thermos was a lot easier for us. But I would make bottles as you go, less to pack and carry. Thermos, formula packets ( or you can get those formula divider containers) and a bottle and you are good to go!
good luck!