I’m case anyone was wondering just heard back from GFC you can use the other bolts as well with the tiedowns mentioned above.
I had some sport climbing anchors floating around and used those for the other bolts
Here is the message I got from GFC
The bolts that are in question are the frame bolts (5/16-18 x 2.5" grade 8 bolt) which secure the RTT to the space frame. There are ten of them around the camper - 4 per side and 2 for the rear. The tie downs that you have pictured can be hung from the frame bolts.
When loosening the frame bolts there may be some water that will start to seep through. If this happens then fully remove the frame bolts and allow the water to completely run out and allow to dry. Over time water can settle in the interior of the campers frame pipes which can lead to rust developing on the inside. For an added measure of rust protection, spray some sort of rust prevention (Frame Saver or Boeshield T-9) into those bolt holes. Prior to reinstalling the bolts, coat the threads with Gasoila
or a similar hard set sealant to reseal the threads of the bolt. Thread the bolts back through the bolt holes and torque to 12 ft-lbs. Check that the frame bolts are tight and are fully sandwiching the tie down to ensure that no water can leak into the frame.