Ok do we plug it in first, or do we turn the switch on first?
No, No, No, first you have to measure the distance from the outlet to the trailer to determine the correct size wire for the voltage drop. Then determine if the outlet is the correct amperage, after determining if it is wired in accordance with...
Oh, and the guys at the tire shop were amazingly cool for me showing up 8 minutes before they closed. Like remarkably so. And, the checkout counter guy simply told me to tip the guys instead of charging me.
Don't forget to torque the lug nuts now and again after you pull it around 50-75 miles and repeat until the lug nuts do not move to guarantee the nuts are seated on alum wheels if you have them. Different than steel wheels which usually only require one torqueing.
I have the standard equalizer on my Wildwood, so this would not apply to the OP. My wildwood weighs about 8000 loaded for camping.
I fabricated a saddle out of 1/4" steel to spread the load over the equalizer. This allows me to jack up one side completely without crawling under the trailer on a wet and rainy night to place a jack.