Congrats on your rig. There has been quite a discussion on www.rv.net.com
on the 347THT and I have participated. I would refer you to that forum in the "Toy Hauler" section----a lot of info. For a direct answer, I used the Bike Pro front wheel chock.
A steel plate is mounted in the floor that allows the wheel chock to be removed when the bike is not in there (giving the "den" more floor space. Also, the Bike Pro chock has a cup that cradles/locks the back of the tire helping to hold the bike in place. I can actually get off the bike and tie it down without assistance. I would have to remeasure where I put the wheel chock because once I actually had the bike in the unit, I had a better pic of where I wanted the bike to ride. OK ok too much info.
Because there were a couple of concerns about the rear tire and suspension bouncing during transit causing damage to the floor, I cut a 25"X13"X5/8" piece of plywood, covered with indoor/outdoor carpet (keep from scratching the linoleum) and slide it in front of the rear tire after I have the bike inside the garage. At this point, I do not have the front tire in the chock, I put the side stand down and rest the bike and then position the rear tire support. When I pull forward into the chock the rear tire is centered +/- on it. This spreads the foot print of the rear tire over a larger area. I also place a soft cotton rag through the spokes of the rear wheel and then run a tie down from D-ring to D-ring. I snug it so the rear of the bike won't shift. I am careful not to cinch it down too much. It can be argued that the suspension will still allow some up/down movement but I don't think it will be severe.
I have a harley, so the frame is exposed on the under side. I put together 3- 2'X8'X13" with a 25"X13" rug covered ply wood "jack stand" if you will. Once I have the front tire/wheel in the chock, I slide the "jack stand" under the frame. (I had to remake it after I decided to do the pad for the rear tire---raised the height of the bike.) I have rug on both sides so as not to scratch linoleum or the bike frame. Once the 2 addons for frame/suspension/tire support are in place, I tie the front down then the rear. By having the support (jack stand) under the frame, I don't have to cinch the front suspension as much. And it is rock solid!!!!!
Although we have only pulled the 5er with the bike in it for about 300 miles total, everything stayed in place and I could not see any problems with it.
Hope this helps,
Have a great day.