Coolers - What size

[megaphoneman]

So i am looking at getting a couple good coolers, it will most likely be an Rtic.
im more curious about size. Currently ihave to colemans, just the walmart versions. I would like to get either two 45's, maybe one 65?
not sure what i should do on sizes. basically two rtic 45's might do the job, but when we do the Round up, we use both coolers for 4 peoples food and drink...

[Rockcrawlintoy]

I like 2 coolers since you can have one for food and one for drink. Keeps the food cold I think. I have been running a 24 qt and a 70. I pull drinks out in the morning and put them in the smaller cooler for the day.