As was said, no on the bumper. Sunline made them on purpose to tear off with much more than a spare tire back there.
I also caution a 3 bike set even if you have a welded on receiver. 3 bikes, the bike rack and the receiver add enough weight on the back of the camper to be a concern that needs to be worked through. The T1950 that starts out with only 11% dry tongue weight and where the added weight can possibly upset the towing stability by making the tongue weight too light.
I know hauling bikes is an issue pending what your TV is. Have you considered other options? What is your TV? We may be able to offer some other options.
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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