Had a chance to look up the specs of the Nano 193BHS (maybe this years model??? Are you looking at a 2015 by chance?).
Dry hitch: 406
Dry trailer weight:3370
Gvwr: 4600
Most add about 1klbs to their trailer, so we will just use the gvwr to estimate the tw. Looks like that trailer has 1-20lb tank and a battery, so at least (approx) 85lbs additional on the tongue.
406 round to 400 for easy math!!! :)
TW- 12%= 480lbs to possibly 15%= 600lbs. With the dry tw and propane tank/ battery being about 490lbs before loading the trailer, I would probably suggest using at least 550-600lbs for the tw toward the Explorers available payload to try to be safe.
Now add ~100lbs for a wdh (some are a little lighter, the family weight, any iPods, iPads, books, etc they may have in the truck, and try to estimate it he weight you will carry in the back (cooler(s), firewood, tools for a tire change, etc....
And now compare that total to the yellow sticker in the drivers door jamb.
As mentioned, get a good wdh!!! Reese HP Dual Cam, Reese SC, and Equal-I-Zer 4 way systems are very good, moderately priced!!! The Anderson seems to have a growing following. BUT, from what I understand it only works on lighter tw trailers (should be ok there!), and certain couplers (trailer coupler that secures the trailer to the ball) it will not work with. So do your homework on the Anderson.
Post back with the yellow sticker number, and family/ estimated cargo weight and we can help more!!!
Good luck!!!