Glad it was helpful! I've traveled with my son alone without hubby since 4 months old from London to NYC (8 hours). We flew to Singapore when he was 9 months, to Hawaii at 11 months, Bangkok at 14 months and Saigon at 17 months. I flew back from NYC to HK alone with him at 19 months (17 hours). Yes, we've done some traveling and I think it does get easier as in less toys etc...and you learn more about how your baby travels after each flight. The hardest part is when they start to move and walk. Our trip from HK/Hawaii and HK/NYC were hard b/c our son had to walk everywhere and was going up and down the aisles.
We brought the carseat on board with us from HK to Hawaii at 11 months and decided to check in for the 2nd leg of our trip which was from Narita to Honolulu. Our son just never liked it and has always preferred sleeping on us. it was just bulky in the end. I think if your baby sleeps in it, then it's probably worth it. If not, it's just a big pain to drag around with you.
Yes, introduce congee now if you are planning to feed it to your baby at the hotel. Every hotel in Asia (Four Seasons, Ritz, Park Hyatt etc...) we've been to has served congee at breakfast. We always took a ton of food back to our hotel room from b-fast like bananas, apples, toast etc...so he could snack on later on. Our son started eating congee at around 7 months old and still eats when he's not well.
good luck!
We brought our own utensils for our son and microwaveable bowl with us so the kitchen could heat up what we needed.