We are a family of four (ds 9 and dd 10) and we much prefer the 1 bdrms. We do stay in a studio sometimes when we are trying to squeeze in another trip on an annual pass, but it feels much less home-y and more like you are staying in any old hotel room. We love the in-room washer and dryer! You can throw a load in the wash in at night, switch it out in the morning, switch again during an afternoon break, etc. When in a studio, you have to commit to your laundry for a couple hours in order to complete a wash and dry cycle.
Having the counter space and full kitchen is so nice as well. We typically do a couple low-key dinners (baked potatoes and tacos) and all breakfasts in the room. If we are taking a longer trip we do a rest day in the middle, and a studio is just too cramped for that.
We were surprised that the 1 bdrm at VGF have only one bathroom - a very spacious bathroom, but just one. We were used to having two at BLT.