99% of my towing is in 2wd. The only times I have used 4wd towing is when I had to tow in the snow. Then it was marvelous.
4wd is great if pulling a camper over grass, dirt, mud, sand, or snow. Depending upon the style of camping you do, you may never leave asphalt and you may live where it never get's icy or snowy. If so, you don't "need" 4wd for towing. You may want it on your vehicle for other reasons, but you won't "need" it for towing.
I use my truck in the winter as my daily driver. We live in the country, in Indiana and when it snows ... it snows! That truck will navigate snow drifts and closed roads when my car won't even make it out of the drive way. For this reason, the 4x4 is priceless!
Besides towing, what else would you use 4x4 for? That's your answer, only you can answer.
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