Only one death so far counts as a derp on my part. I've starved once and fell off once, but after getting started a second time things began to go well. Got a Igneous Extruder, plenty of cobble platforms, decided let's go take a peek in the Nether. No armor, but two cobalt hammers from the reward bags and I thought so long as I was careful, stayed close to the portal I'd be safe. Then an angry zombie pigman races around the corner, smacks me around, follows me through my portal and kills me. I did eventually kill him, then instantly destroyed my portal and I'm not sure I'm going to go back anytime soon. Not without armor and some better weapons.
Thaumostatic Harness helps a lot with nether travel. The only thing you can't fly away from is fire bats, and only because they fly just as fast as you do.
Surprisingly, when i went into the nether, i didn't find anything. No ghasts, creepers, bats, spiders, or even pigmen. I did eventually manage to find an imp. I basically had free run of the whole place. Weird part was, i wasn't on peaceful. When in, collected a full inventory and left.