I tow a 21 foot boat about 10 times during the year. I have noticed that that the rear of my vehicle is weighted down a lot which sometimes puts the rear of the vehicle close or in the water when launching the boat. I have heard there are air bags that can be put in the rear suspension area to be used when towing. Would this be a good idea? Any recommendations for type of product to use? Cost estimate?

Air Rite and Firestone makes them...I have heard mixed reports over at another sire.
They seam to fail within the 1st 1000 miles due to exhaust heat on the right side.

I have installed Air Lift on my 2004 and still working fine. The kit will come with exhaust shield. I have it on my Durango for about 4k mile now.

Can you post any pictures of the bags installed?