Contrary to what was mentioned above, March for DVC is not a high demand time. DVC's high demand season is late Sep to marathon weekend in Jan. During that time, it can be hard to get anything at 7-months out other than SSR, OKW, and Kidani (and even those fill at times during that fall season before 7-months out. For March 2023, Poly standard view studios were open at 7-months out for all days in March. For 2024, a couple days in the last week of March disappeared before 7-months out -- Easter is March 31. CCV is a different story. Studios and 2BRs can sometimes be missing a couple days a week for any given week in March before 7-months out, although they are usually easy to get even at 10 months out.
If you are still considering Poly, be aware that if you get two studios and request that they be connecting, chances of that happening are very high. Every studio at Poly, except two, connects to another studio. It is the only existing WDW DVC resort that has connecting studios.
Be aware that the CCV 2BRs are among the smaller DVC 2BRs at WDW. The only ones smaller are the value 2BRs at AKV Jambo. AKV Kidani 2BRs are among the larger 2BRs and have 3 bathrooms; likewise BLT. If you are considering CCV, you might also want to check Boulder Ridge --at the same overall resort, WL, but just a separate building from the main WL building. and it has somewhat larger rooms than CCV for a like point cost.