HELP! Traveling at 37/38 weeks

Jessica • 2nd baby pregnancy! ❤️
So we were all set to go to my hisband's favorite cousin's wedding on the coast by plane in September with our 4 month old at that point and 2 year old. A headache, but doable. Now she's switched the wedding to be in my state, do it is drive able, but she also moved it to April 3! That's when I'm between 37 and 38 weeks pregnant and it is still 3.5 hours away! We have decided we'll see how I feel then and decide whether or not to risk not delivering in our chosen hospital. No one else seems to think this is a big deal on his side, but I have this plan and all of my info is on this side (negative blood type, strep positive, etc.) and I don't want a crappy doc outside my practice. But I LOVE this girl and want to see her get married too! To top it off, my first delivery was only 10 hours, so they're telling me that odds are with me for it to be pretty quick this time. Sigh. I don't know what to do. Thoughts?