Why not check on the emulator?
As for Let's go Camping, I tried for ages to find a solution where they all go down, and the best I can find requires one more builder. The one where one goes down is this:
Lem1 blocks. Lem2 turns and exit. Lem3 digs and bashes, releases the blocker. Blocker walks on, basher builds to turn, builds back out to the left. (There are a few variations of this start, such as if the blocker falls and turns, making the basher go instead, or if the digger's hole is shallow enough not to require a build out of.) Whatever lemming is on the small block below, make him build, build under the wall with the trap so he turns, build to the wall to the left, bash through, build twice to the wall to the far left, build again when he turns right.
Unfortunately, I can think of no way to make this possible while eradicating all the backroutes that don't use the floor.