We recently did a split stay at Poly and BC over 8 nights and loved it. We felt like we actually GAINED time because we were generally closer to the parks and restaurants we planned to visit on a given day (only had to use the buses on our AK day). Plus we got to experience two different resorts (like two vacations in one). In fact, we liked it so much that I'm planning another split stay at 4 resorts over 12 nights. Originally, I was going to just do a 2 way "lodge themed" split at WL and AKL because I really want to experience those resorts. But I couldn't bring myself to give up the ambiance (and Monorail access) of the Poly and the location of BC for visiting EP and HS. So the current plan is 3 nights at each of WL, Poly, AKL, and BC.