As to choice of resort, a lot depends on whether you are an owner of one of those resorts and time of year you intend to go, since you may find it difficult to get a room you want.
Owners can reserve their home resort beginning at 8 a.m.11-months out from date of arrival; other
DVC members can reserve a non-owned resort 7-months out. If you want any studios at CCV, you need to be an owner attempting to reserve right at 8 a.m. eastern at 11-months out and even then you might fail to get the reservation because during the fall those typically fill within nanoseconds after 8 a.m., and likewise intermittently the rest of the year. Also,1BRs typically fill before 7-months out in the fall and intermittently the rest of the year.
At AKV, value and club level studios disappear at or before 8 a.m. at 11-months out 85% of the year; value and club level 1BRs also sometimes fill right at 11-months out and are seldom available at 7 months out. standard and savanna view studios, and sometimes 1BRs, can fill before 7-months out in the fall; during the rest of the year standard and savanna view 1BRs are typically open even at 7-months out, while studios at Jambo are about 50/50 at 7-months out, and standard studios at Kidani can fill occasionally before 7-months out, but savanna studios are usually open.
For particular rooms, be aware that CCV does not allow 5 in a 1BR. AKV 1BRs (other than value) allow and have sleeping spots for 5 (king bed in bedroom, and pull-out couch queen and a twin sleeper chair in the living room). The Kidani 1BR is larger and has two bathrooms and thus is ideal for 5.
In essence, if your choice is a 1BR for 5, I would suggest trying to get a 1BR at Kidani if room comfort plays any part in your equation for choosing a room. Between a studio and 1BR at CCV, you cannot choose the 1BR for 5, and you are unlikely to be able to get two studios, so CCV is an unlikely choice.