Thanks for all the responses....well, except for the "crude" one - I suppose I could have whittled down some nice oak and put on 6 coats of varnish etc for the mounts, but....
Just got back from a 2 week trip.
Bikes never moved, no frame rub, and ended up storing the wheels in with the bikes.
Took about two extra minutes to unload 'em when compared to our previous trailer that had the bike doors....no big deal.
I'm in Canada and got my Swagman mounts from MEC. which is the closest equivalent to REI you have down South.
They were about $22 each, but I'm sure there are comparable deals on any of the US sites. If you go for Thule or Yakima, yeah, they're gonna' cost you, but these cheap ones are doing the trick for me.
Actually noticed a few people slowing down when passing me trying to figure out why there were four sets of handlebars staring out at them from inside a travel trailer
Will update if there are any developments.
Gotta' love being cheap with a fine assortment of tools in the garage.
To one of the previous posts, Yes, it is a Kona...although an old one.