I'm getting ready to fly to Dallas for a few days at the end of the month for a conference. We are not renting a car, we will just take a cab, bus, or shuttle when we need to go somewhere that we can't walk to. My question is, do I use a car seat in those situations? DS has a Roundabout, which I would think would be a pain to haul around town when we are out walking around. He just outgrew (lengthwise) his infant carrier that fits on his stroller, should I just take that and use it? I'm not really sure what my options are. I also don't want something to accidentaly happen to his RA, we spent a lot of money on it and I don't want to have to replace already. TIA, I really appreciate it!