Start spear and Gromp, stand at max range for max damage on first spear to help clear. Or start traps and start wolves, with a half decent leash you should be able to clear those faster then gromp with spear. as for early clear, wait till they are really pushed up or if your laner can stun/root to make it easier for first spear. Also, one big thing about nidalee, after first back, you can counter gank and ward REALLY effectively. if you dont want to gank because you arent comfortable with it, counter jungle and ward so your team cant get effectively ganked. buy pinks and Trackers knife so you can have amazing vision and have your team leave lane to catch the enemy jungler out with your help. it'll get you and your team to mid game faster where nidalee spikes. I hope this is helpful.
Please have a wonderful day good friend :D