Also be aware that neither the bedroll, nor the LandClaim Block, suppress all spawns. In the case of the LCB, it will only suppress POI sleeper spawns. In the case of the bedroll, it only suppresses POI sleeper, and random biome spawns.
Neither is going to completely stop zeds from spawning.
The console command should work for that game session, but it's going to be difficult to have it persistent. The setting is stored in a flat database file in your save folder.