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That isn't an overly heavy setup. The 3.0 mini tent is 125 lbs., the crossbars will be maybe 7-10 lbs, and most bed covers are less than 50lbs I believe. It will be roughly the same weight as I carry in mine. I haven't done any collars or springs on mine. I personally didn't care for the ride my past raptors had with springs or collars. My truck with a loaded bed may be the slightest bit higher in the rear. Very slight. I can't stand a nose high truck, so I have been happy with the factory setup with my bed weight. I have gone camping, hunting, and backroads and never touched the bottom of the truck. Unless you are rock crawling, I don't think you'll have clearance issues. If you are crawling over rocks I can't picture how 1" more clearance will save the day to be honest.