We did the exact same thing you are doing, Wonder to HRH. We got caught in a traffic jam and had to take a different route to the HRH and we were still in the parks by noon. Check-in at the HRH was a breeze and Universal is a very short walk, less than 5 minutes, from HRH. Don't forget that you will have frony of the line access at the park too. This allows you to do soooo much more. I think in order to do all the rides AND shows, the park will need to be open until 7 or 8 the day you are there. The park closed at 6pm the day we arrived so we didn't get to do everything. But we were there for 6 days so we weren't really trying. I think we actually left the park around 5pm that day to have dinner at the NASCAR Cafe.