Welcome Rick.
Its going out on a limb...a little bit...without seeing any scale weights of truck and camper.
But there is enough history now for the 855S that I'll say you should be fine with your truck in stock configuration.
Check the tires/wheels...that may be your only concern.
Any suspension mods for a 2015 1 ton will be personal preference...I doubt very much they would be required. Many Folks are carrying the 855S on 3/4 tons (with and w/out mods).
Have you looked at AF811 and EC85O also?
You should before you pull the trigger.
Good luck,
Bill