Joe, the airbags will level the Tundra, which makes your headlights point in the right direction. But they won't do anything to put the missing weight back on the front wheels - the wheels which steer (and largely brake) your Tundra. That is what a WDH will do. If degraded steering and braking aren't important in your situation, then I guess you needn't be concerned.
On large / long / heavy vehicles, the tongue weight doesn't unload the front wheels very much. In that case, a WDH may not be necessary. A Tundra? Especially a 2002? Well, some people will tell you that it is "big enough" that it doesn't need a WDH. But the fact that you have to use airbags to level it says otherwise.
I wish you luck. But in your place, I wouldn't leave home without it.
Bill
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