the problem with stretching things out to several months is you end up forgetting things you studied 2-3 months prior; maybe not general concepts but more specific details. Of course, its debatable how much the dat relies testing on on those finer points, but imo its better to be safe than sorry.
My recommendation, assuming you had three months prep time, would be the following:
#1 get all of the resources you plan on using in one shot, that way youre not 4 weeks in and realize "oh **** i really should have gotten another bio source" and then have your schedule offset. Look at some strong breakdowns, make a list of stuff they used, and get those resources. In retrospect i would definitely look in the the datqvault bio questions.
#2 once you have those materials, spend 1.5-2 months consolidating and organizing info into condensed, high yield notes that get to the point w/o the fluff. Lets say you use chads videos, odds are youre gonna know 80% of the stuff in them. For that other 20%, make sure you take down everything you feel weak on, it really helps with subsequent references and helps eliminate redundancy of going over things youre good on. I like to think of this as the "investment phase" of studying, disregarding familiar concepts/details and documenting what youre weak on.
#3 with the remaining 1-1.5 months, thats when you cram all the **** you gathered from step#2 into your head. It will most likely still be a good chunk of material, but figure you sift through 80% of chads stuff you already know, maybe 70% of campbells you're good with, etc. It really allows you to shift your focus on things youre fuzzy on and the overall relative lack of volume will let you ingrain that info into your head w/o too much time passing for you to start forgetting stuff.
So i guess my answer is yes and no. Use the bulk of your study time as an investment and consolidation phase of all possible testable material and the last month or so cramming that small percentage of stuff you need work on into your head. Hope that helped/wasnt too confusing, lemme know if you have anymore questions