4runnerk ........ The wife and I started with a new Jayco popup camper but it did not wan't to go up and down

So after many frustrating problems we bought the 19H. As for towing I think it does just fine ....... It takes a little bit to get her moving like getting on a hiway on ramp but I can hold 70 mph no problem. My 4runner is a 5 speed auto and I was told to drive it in forth gear when towing so I do. I get about 10 mpg when towing the camper I don't think you can do much better than that even if you had a V8.
A few things to remember when towing if you notice the truck shifting often then down shift it yourself and let her rev it's better to work the engine then heat up the trans.
Now about that Jayco 19H:
Make sure you ck the lug nuts on each wheel after your first time out. Next year greese the EZ-lube axle's with a high temp greese and don't use a synthetic greese use a high temp lithium based greese (with a drop point of 400 plus deg.) the axle's should be greesed once a year.
Always ck the RV tire pressure they should be at 50 psi.
Always ck everything before you go out the Fridge, the Stove, The Heater etc, etc.
A little hint if you can't get the fridge to fire on gas then light the stove first and let it run and then switch the fridge to gas and it will most likely light off.
Go to the camping world web site and get yourself some leveling blocks and some wheel chocks. I also have a set of wheel locks that you put between the tandem camper wheels. This keeps the camper from rolling down a hill when you un hook the camper from the truck.
When you get the 19H you should season the tent sides by opening them up and spraying them with water and then letting the sun dry them. You should do this about three times before use as it will srink the seams.
After you come back from your trip don't forget to leave the fridge open and the next day empty the drip pan as it will have water in it.
Make sure you get a pressure relief valve for your drinking water hose as most campgrounds run quite a bit of pressure in there lines. ck with camping world for this stuff.
When I think of other things I will post more info
Where do you live??