In days of yore, the publishers used to arrange an insured van that went round the motorway network picking up pre-booked models at a number of strategically convenient services. I think Ted Jolliffe and a mate used to drive it.
Obviously it's not as simple as just hiring a van, there's a lot of organisation to be done. Tubal Cain wrote a long article on how to pack your model (his were in custom wooden crates with lengthing assmebly and packing instructions). I suspect that in this rushed age only items that can easily be popped in and out of a box would be welcome. there's also the dread issue of 'what if the box goes missing'?
This has obviously worked in the past, but there would be a cost, especially as I think it would need a person with dedicated responsibility for unpacking, tracking and repacking the models would be needed. I don't think it would be fair to expect the editor to take on those extra responsibilities at a time of near chaos!
The buddy system would be simpler, but I hear what people say about the risks.
Perhaps a 'third way' would be to get one of the suppliers to organise an open day alongside a simple exhibition (no prizes, just a display) of forum member's models. We get a modest sized meet-up somehwere, they get some extra trade and it could be timed well away from a major exhibition. Or maybe a club wiould be willing to host a low-key event of this kind, rather than one limited to 'own members' models?
Neril