I would still do the Cognito's. They are a preventative as well.
I wouldn't worry about a second snatch block if you wheel with others, if you get into a funky situation requiring 2, someone else usually has one.
Get something strong and else besides the stock wrench for removing the lugs should you have to change a tire, we bent the stock one in Tellico.
And I don't think tire chains will even work with 37". They'll probably tear up the wheel wells.
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