Can we take off GAP insurance?

Ok so we went to Ford Dealership and got a 2019 car.
We were gonna pay 479 monthly so it would be 27xxx after fees and all that.
Well before we signed the guy comes and tells my husband that there's the insurance Gap blah blah blah for 6 years but our payment would be 579 after. So i told my husband that it was up to him and walked off to my toddler. So he decides to get it which i was mad about. After he agrees we go to the back room to sign and all. The guy tells us all fast this is the monthly payment of 579 your purchsed this vehicle at 27xxx with 17 monthly payments. So my husband signed and as we got home i see that the Final price of the vehicle will be 41xxx!
I'm wondering that if i can go tomorrow at open time and ask if we can take off gap since its been less than 15 hours since purchase cus i mean if you really think about it its only for 6 years but the payment stays 579 after the six years of gap…, what would i be paying 579 for, after the 6 years has passed?

Remanufactured Ford Long Block Engine. When should I get first oil change?

Recently had a Ford remanufactured 2.5L 4cyl long block engine replaced in my car. Other than obviously not beating on the engine, I'm curious as to when to get the first oil change. I've came across a few different answers ranging from 1k miles to 2.5k.

I'm creeping up to 1k mile on the engine and would be grateful for insights.

Exceeding tow capacity of 2000 Ford Excursion?

We have a 2000 Ford Excursion 4x4 with a brand new 5.4 V8 engine. We recently bought a camper that we would like to take from New Jersey to Nova Scotia. WE HAVE NO EXPERIENCE WITH TRAILERS, so obviously we're trying to learn all we can.
I believe the trailer is about 6400lbs with max at about 8800. We bought proportional brake controller and a weight distribution hitch rated for 10,000lbs.
We're thinking will we end up maxing out the weight at 8800 which would be about 1000 lbs over what I believe the capacity is for the Excursion.
Is there anything we can do to make this trip safely? We don't mind if it takes us a week! Slow is ok. But there are substantial hills to climb.

Added (1). PS I thought the max capacity for the Excursion was higher, when we bought the trailer. Now I'm concerned. We could possibly sell the trailer/camper, but we got a good deal and we would really love to keep it!