Sometimes I wonder about the axle weights posted on the internet and if the taker of those reading knows what there doing..
Example:As an old semi driver mostly for logs but wintertime flatbed use,I have weighed a million times on state scales..They do not let you do your own as in pulling up to where you "think" you should..They have stop lights to guide you to the proper place on the scales.You do not enter the scales until the light turns green,then very slowly you move forward until the red light flashes to stop..You do that for every axle until they give you the green light o go on in your travels or pull over for a lip lashing and ticket...Had a few of those..
My point is,Arctic Fox 811 and 990 rear axle weights are all over the board on the internet.I follow them because my wife is in love with the AF truck campers..
To the op...There are a ton of folks with the 811 on similar rigs as yours with a bunch of mods to make it better..Your truck will carry that camper with the mods suggested by others who have done it and it will carry it without any mods but beware the way it might handle without them...Double beware(laughing)
I have hauled worse without mods on a 1957 1/2 ton towing a two horse trailer with a very large palomino and an Arabian with hay on the roof and tack room and all the gear for two weeks hunting Idaho Elk on one of the most wash boardy roads Idaho has..Never broke an axle or blew a tire and the tires were considered heavy duty back then at 6 or 8 ply.
The guy saying you would be a danger to us all is showing his inexperience doing anything similar in my opinion..