For me, 5 days is too long. When my kids were younger it was ok as we'd go back to the hotel after lunch for naps. Now that they're older we pretty much go, go, go all day. We usually spend one full day doing DL, one full day doing CA Adventure, and maybe one day going back and forth to do any rides we missed or want to do again. Granted, we go off season so the wait time is rarely more than 15-20 minutes (or we do FP) so we can get through everything quickly. We also take a day to go to
Legoland, although I think my kids are getting too old for that now.