OK, got it. Never mind all the above crap I wrote about tailgates and travel trailers, obviously.
There are lots of options for hitch racks up to four bikes but six is a stretch. I found a few that are like a regular 2-bike tylp but more of them are the kind that carry the bikes in a wheelie. Some of them block the lift gate. Do you feel like the roof is too far to reach? There's room for four there too.
This is not a very big vehicle to carry six people and all their stuff. You can also use that hitch to haul a trailer. If that's the plan anyhow you can put a roof rack on a Coleman style pop up
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Genesis 49:16-17