You should have been able to order a factory rack for the back of your trailer. Ours has it and it holds I think a max of 250. Sorry, no pics.
We've not used it yet but now that my youngest is on a two wheeler we'll be using it for bikes this summer.
more info in this recent thread Bikes on Grey Wolf rear rack, maybe??
Jill & Chris, Wills (14) Evie (11) & Toby our collie (5)
2011 Grey Wolf 28BH
2013 Chevy K1500 Crew w/ Reese StraitLine Dual Cam
Nights camped 2011: 11 2012: 18 2013: 12 2014: 12 2015: 13 2016: 3