Thanks for all the good tips.
We do have the V6, and I have the WDH with sway control that the owner sold to us also.
Hooked it up, leveled it, and it towed like a dream behind the RAV4. We took the back road home to see how it would do on hills and turns and it pulled them flawlessly. I kept an eye on my gauges and everything looked good.
Getting a trans cooler is next on the horizon. We probably won't go anywhere in it until this fall as we've already burned up our vacation balances from work for this year.
I'm certainly not opposed to getting a bigger rig to tow it with. I have a 1993 Chevrolet K1500 but it doesn't quite get the mileage I like when towing.
The previous owner said that he runs his fridge for a few days before a trip at home, loads it with the frozen goods and then drives to his campsite with the fridge turned off, and then turns it back on when he hooks up to power there. I'm thinking we will probably do the same. We seldom dry camp, and the resorts we belong to all have full hookups.
I'm thinking that we will try to go to Mount Rushmore next year with it as I haven't been there since I was a kid.