We try to avoid split stays for shorter trips and prefer them when we have 10+ day trip. Minimum for the splits for us would be 4 nights at any resort. Exception was 1 night stay prior to
Disney Cruise. Like others have said, I prefer to get up early and drive our luggage over to the second resort and have bell service hold them. Sometimes we plan that transfer day to be a pool day in the morning and then hit a park in the evening after we get our room. Currently we like doing some combination or BCV, RIV and BLT. Easter break we have 5 nights BCV and 5 nights RIV.