Newbie question

To compare I have a 19 ft rubicon toy hauler which is about 5700lbs (dry) then add my Harley super glide just a normal cruiser and it is about 680lbs, my freshwater tank holds 82 gallons (~ 650lb), then add gear, kitchen stuff, propane, batteries, etc... you will be well over the 1000lbs you estimated. What I would look at is what does the trailer weigh and how much is the cargo capacity. Then get a truck to meet or even better to exceed that (in case you get a larger trailer later on). I started towing that rig with a 2011 F-150 V8 5.4L and it worked it hard and it also squatted the truck big time. After about 3 trips I traded it in for a 2012 Ram 2500 with a cummins and dont regret it one bit! Towing that setup with the cummins on flat ground I will get 12/13 MPG, mountains 9/10MPG the F-150 was lucky to get 10 MPG. Trailer hardly even drops the rear of the new truck maybe inch or 2 and the extra power is nice for the hills, also the heavier duty truck is much more stable towing. It is also my daily driver, I get about 19 MPG on the highway and 14ish in town. If it wasn't for the mountain driving out west I would have prolly gone with a 2500 gas to save some money on the price of the truck. Hope this helps.