We've split our stay several times (tho' haven't stayed at HRH yet, just PBH and RPR). I love WDW, but my DS (17) and DD (15) love the big rides at Universal, and I agree with Bev that it's very relaxing to walk or take the boat to IOA or US and know you've got FOTL. We can go back to the hotel to relax when it's really hot and return later if we want. I agree, tho', that the CMs at WDW seem to be more helpful and friendly generally than at Universal in the parks and the hotels.