If just the two of you will be out in the Element in your bikes, I suggest folding the rear seats against the windows, grabbing some tie down cables, and setting one bike against each "seat wall." For each bike: run the cable through the hand-hold bar (no idea what these things are really called) near the interior roof, across the front (really the back) of the seat, and through the metal hook at the floor. Then cinch the cable securely around the front of the bike. This holds the bike against the seat, cushions it against bumps etc, and costs like $2. My husband and I jerryrigged this solution and couldn't believe it worked so well--no movement in the bikes at all, even on an exceptionally rutted road. Of couse, you'll want to wipe your bikes down a bit after an off-road ride so that the backs of the seats don't get all cruddy. But, seriously, why would anyone pay what Honda's asking for that interior bike rack when a pratically no-cost alternative is so much easier to use?