Heading to Seattle Washington

This weekend we leave for our longest airplane trip to Seattle. Many problems of what to bring still run through my head as I try to fall asleep at night. Do I bring a stroller with me or not. It's crazy heavy to pick up when compressed and I'm afraid it will get damaged and dirty in transit if I check the stroller with my luggage. Also is it worth it to buy a small car seat caddy to drag the car seat around the airport? Everything cost money these days so I have to be very money conscience to make sure I dont spend money I do not have on things I will only use once. Baby stuff is very expensive.