I don't think the recovery eyes would take that sort of load either TBH, although at least all you'd breaks is the recovery eye rather than ripping off the front axle!!
I'm not familliar with how road trains are configured, but don't those trailers rest on a 5th wheel on a dummy axle, so you would have a full size set of wheels under the front? If not, I would still think might be better to drop a trailer, legs on wood, pull the rig and one trailer out, then back the rig back down to try and recover the rest. Your problem of course is if you find you can't get the rig back down your trailers are stranded and your screwed!
it's also a problem if people are fundamentally a bit idle!! just a bit of digging in front of the wheels makes an enormous difference to the inertia of the load.