H3 Builder ? about off road suspension, and tires and rims

[oneworld]

H3 Builder, will the 33 inch tires fit on the stock rims, my concern is as follows > dealer ordered mine with out the adventure pac, only lux pac, I am not sure if I will realy ever need to use the locking differential, I will go off road but probaly not extreme, and I want the larger tires, are their any other differences in the suspension other then the lockin dif, becuase I realy do not want to wait to reorder. Any advise would be greatly apprieciated my H3 is due in on monday and I want to know if I should reorder or not. Thanks