i mean, the breaker to that is plant you and your buddies place your sleeping bags away from the exclusion zone with your own cupboard (one player's primary if you implement that) so you can respawn instantly.
really, it's fair as it is(the sleeping bags, not the 4 v 1 or whatever it was, but even that is just the nature of rust and playing solo). anything you do needs to be equivilent for both the raider and the raided.
the best solution i ever came to was to have each player limited to say 2-3 sleeping bags. if you plant a fourth, the first breaks automatically. that way you can have a backup, and one for raiding, but you can't simply zerg a site.
One at a base and another to camp a site. Good one. One bag should be enough.