Advice for a newbie

So in August, sorta of on a whim i bought a 2018 Gulf Stream Friendship 275FBG (29'10") Trailer. The trailer was barely used at all, and our family is really excited to use it. My current truck is a 2014 GMC Sierra 1500, rated to pull 9400lbs and a payload of 1710lbs. If my math works it should be plenty of truck, but would like a second opinion or two. Tongue weight is 690lbs, figured another 100 for Husky Center line setup and 135lbs for fuel, should leave in the 800lb range for me my wife and 4 and 7 year old kids. We all add up to around 450 so think that leaves some room but not a lot for stuff in the truck. The trailer dry weighs 4738 and caps out at 7700lbs. I never plan on towing fully loaded (water tanks and such), but just curious if i am figuring this out right.

I towed it 80miles one way already felt good on highway and did not get blown around. It felt good actually and a couple times I looked in the rear view and forgot it was there.

Any Advice or tips would be appreciated.