toddler bed troubles

sorry in advance for the long post.. The time has come for our LO to go into a bed since he is tall and was climbing out the crib. He's always been an awesome sleeper, sleeping through the night from 2 mos with little to no regressions, bed time 8pm wake up time 730am. So we were concerned of changing up his schedule. The first few nights of bed transition went pretty well; trying to put him to bed at his normal bed time resulted in him leaving his room every 10 seconds, so he went to bed really late and hubby had to stay in his room until he fell asleep. Other than those minor hiccups, he slept through the night and only came out of his room when he woke up in the morning-again (completely out of schedule but that's not the issue). On Day 4, he woke up at 4am and came into our room and started playing. since then he's done it every day again. We take him to his room and put him in bed and he falls right to sleep. We have followed the tips of rewards for staying in room, silent leading back to bed, go to our room so he doesn't feel like he's missing out... what feels like everything. Does anyone have any tips?