Keep in mind advertised dry weights are usually without options, also battery, propane, etc. The yellow sticker is as it left the factory & will never be that light again.
Our camper was over 500 lbs more than the advertised dry weight when it got to the dealer (by the yellow sticker). Its a TH so bad example but weights were about 9200 advertised weight, Yellow sticker is 9800 when it got to the dealer, and with gear by the Cat Scales 13800 lbs.
1/2 ton pickups are not a good idea for a camper of the weight weight you are looking at. The truck will always be under a strain until something gives usually the transmission, let alone safety issues.
Not to say not, but after towing over the years of 1/2s, 3/4 and now a one ton would not tow anything of that weight with less than a one ton. But yes it can be done with a 3/4.(I will be like the manufacturers when equipped properly).
I agree with other posts buy all the truck you can afford even if if is a couple of years old.