I got the wife a 05 yukon denali and we want to lower it probably a 2/3 but we are also looking at getting a travel trailer to take the kids camping... anyone do any towing with theirs and have photos? Thank you

 

Might want to do helper bags in the back ?

I've seen lots of trucks / SUV that are lowered tow just fine .

 

It has the rear factory air shocks on it

 

The best way possible is to air bag the rear and lower the front to match.
Post pictures of the truck and confirm it is coil sprung in the rear and this is easy as pie.(unless it is the XL it should be coil sprung.)
Here is my Tahoe, front is just decranked and the rear bagged. I first installed a level valve so that it was compleatly self sefficiant, worked great but eventualy decided I wanted put valves and a switch on it.

Here she is sitting level with a 28ft camper.

Here she is level with a 12,000+ min ex.

 

If the camper is really light you might be able to get away with just lowering it and letting the air shocks handle it. They aren't really ment for towing, they are mostly to just keep the truck level with people in the truck.

 

Yeah that's what I was hoping that the factory air would just level it out. And it is spring in the rear. Im looking at getting a 21' rockwood hybrid. Also want to know how the ride is

 

My ride is great. That is what air ride does for you. Good ride and extream load capacity.

a 21ft camper could be kinda heavy and will probably sag the rear a little bit. Because of that I would leave a 1 inch rake in the truck if you just do a lowering spring. That will let it settle some with the camper and sit level. That is best for alignment and handling.

 

when you get the travel trailer, invest in a weight distribution hitch... That will take care of all of your problems.