In order to get on Remy without any wait by entering IG at early entry, you need to be at the front of the rope drop pack. For an 8am early entry, you need to be at IG between 7-7:15am to have a 0-10 minute wait once you are in the park. At 7am, the skyliner starts, and the first batch of people will be arriving by 7:10ish, plus the Epcot resorts area people will be walking to IG during that time. If you arrive to IG after 7:15am, you will be looking at a 30 minute wait once you get in. If you arrive to IG at 7:45am, you will have a 60 minute wait once you get in. Essentially, you have to arrive at IG by 7:15 to make early entry rope drop worth it.
My advice is to rideshare to Swolphin. You will not get the parking lot security issue you will get at Boardwalk or Beach Club. It's a 10 minute walk to IG from there. And you can control when you arrive, leaving as early as you want from AKL.
Resort transportation and skyliner starts one hour prior to early entry. In a perfect scenario, you would catch the first bus to HS from AKL at 7am. Say it takes 15 minutes to get to HS. Then it would take 30 minutes to take the skyliner to IG. Your BEST arrival time at IG is 7:45am. You could walk from HS to IG. I can make that walk in 15 minutes, but my family couldn't (more likely 25 minutes). So the earliest you could possibly be at IG is 7:30-7:40. At that time, you are looking at a 30-45 minute wait for Remy, with possibly an hour.
Pay for the rideshare to Swolfin. Arrive there at 6:45am. Walk to IG by 7am, get right on Remy at early entry, and you can possibly get on or a good spot in line for Frozen before the non-resort guests are let in at 8:30am. You've knocked out two priority attractions by 9am without G+.
