I also agree with most above. That is far more truck than you need for a 30' trailer. The truck will outweigh the trailer by several thousand pounds. We have been in state and COE parks where that would rule out many of the sites. And the longer sites are typically the most in demand and 1st to be claimed.
Generally not a problem in commercial RV parks. If you plan on boondocking in less developed areas, then the size is less of a concern.
I know you said only you and your wife, but with a TH in only 30' length the garage doesn't leave a lot of living space. Could get pretty small on extended stays. Look over all the floorplans carefully before writing the check.