Talking about camping in EggWars,
Back in the days building under an island was a strategy. And yes I can't deny it, I've done it as well. Not meant the camping purposes.
Some of us used to build under so we were able to build to opponent's island taking the egg without their notices. Nowdays you seem to only be able to build upways to the enemy and most of the times it's a notable thing. (The way without enderpearls)
In my opinion, the rules of camping should stay as the same. But making the feature to build under possible again. Simply because it was part of the game.
The whole idea of EggWars is to protect your egg but the same time the idea as well is to take the oppenent's egg by using different strategies and sneaking to the island. When EggWars got this limit you can't build bridges under your island anymore, it as well made one of the possible sneak way impossible.
Sometimes I feel an enderpearl is an easy way out, and it doesn't need that much brainwork to just throw the pearl and taking the egg using your Eff 8 pickaxe.
Yes this would increase the camping, but that would be as well handled as people handled it before. If someone builds under, build yourself too and kill or spleef the guy. Such simple.
Talking about those glowstone bridges back in the days, those were awesome