We went camping this weekend and took bikes for everyone in the family, so to kind of close out my original post, I thought I would post the actual pictures of the bike rack in action. We are a family of 4, so I needed 4 bikes. I feel three bikes is just about the right amount to put on this front bike bunk. Especially with the kids bikes...they are kind of funny shaped and needed to be worked with to get them to even fit...the kids have about outgrown these bikes, so they will be getting regular grown up bikes soon. I think regular mountain bikes would fit much better....
I put my mountain bike on the back ladder rack that I installed. It worked really well. I used bungee cords to keep it snug against the ladder. It is made to hold two bikes and I would feel comfortable with that if needed. I thought about hanging some fancy reclining chairs there too, but decided against that for this trip.
Anyway, everything worked great and I hope this post helps some people...oh, I did see another travel trailer driving down the highway with two bikes attached to the rear bumper. Those things were moving like crazy and it did not look very stable and I can see the concern with adding weight to the flimsy rear bumpers...I wish I had taken a picture, but we were in heavy traffic....