I can't speak from personal experience, but I did work in Apple retail for 5 years up until a year ago. Recently I spoke with one of my coworkers who has converted her entire photography workflow onto an iPad and she has one of the 12" MacBooks with the Retina display that only weights 2 pounds.
As much as it kills me to say it, I think you are on the right track. I'm a huge Mac fan. I prefer the Snow Leopard era.
Having over 10 years of computer sales experience, my advice is to make the transition slowly. Trying to switch cold turkey can be an exercise in frustration. Try to do things and experiment with the iPad when you have free time (not when you "need" to get something done). If you are struggling, you can typically do a Google search and find someone who has experienced the same issue and find out what their solution to the workflow was.
Let's face it though, there may still be limitations with the iPad. That being said, work towards using the MacBook Pro less and less. Eventually there will come a point where you are doing everything on your iPad.
As a side note, your MacBook Pro is getting a bit older. That doesn't make it any less useful. Quite often as machines age they get relegated to doing a single task that they do quite well. In your case it may be used for archiving, organizing and backing up photos.
Best of luck in the transition.
BTW, worst case scenario is you will have a cool iPad that you are bound to still get plenty of use out of.
Edited by Bill D, 09 December 2017 - 04:04 AM.