The better sleeping mod is either really badly configured or broken. It takes about 5 minecraft days full of running, jumping, and digging solid to get enough tired to sleep, so early game means waiting on night to finish over and over and over. Also the config has it set to require 0.4 players in bed to skip night, which should be 40%, but in reality it requires every player on the server to get into bed.
Yeah, Better Sleeping's sleep voting system doesn't work too well. Fortunately, Morpheus works with Better Sleeping and solves that issue there. Morpheus will be added back to the pack in 2.0.1.
I've never had a problem sleeping, but then, I don't really try to sleep every night. I admit that one of my complaints about Better Sleeping is the forced balancing act; if I make it so you can sleep every night, you pretty much have to sleep every night. On the other side, if you set the configs such that you can go a few nights without sleep, you'll run into nights where you literally cannot sleep because you're too well rested. If caffeine were a viable method of staving off sleep, the first option would probably be acceptable, but since caffeine doesn't do much with the current configs, well, that isn't an option. I did, however, edit the configs in 2.0.1 such that caffeine is very viable for staying awake.
I like the concept of Better Sleeping, but given the frustrations I'm having with balancing it, and the sheer volume of complaints I get, I am considering removing it. I'm sure a few people would be pleased if I do.