That's a loaded question

As Darsben says
Make yourself a list:
2-3 people = _____ lbs
Fuel = _____lbs
Stuff, travel goods = ___lbs
Firewood etc
How much GROSS will my trailer weigh? Loaded question. How much does my lawnmower weigh? It depends what kind of lawnmower I have, right

TT at least, a realistic estimate. We like to say we "Gross' out the trailer, I don't. My dry is 4500lbs, totally loaded I'm close to 6000lbs
After you get trailer estimated, add the tongue weight in.
A 25' TT, no slides, ya, you can probably do it no problems. Add slides, adds weight. And I have no idea what a Toy Hauler weighs.