What tables need table skirts?

So I'm trying to save some money and also not be so wasteful. I'm trying to cut back on table skirting in certain areas. I really want it for the head table and for the cake tables. We are also offering a candy buffet and a mix of fruits with the cake and as well as snacks before the actual wedding dinner starts. Don't cringe when I say this, but we are doing plastic. It is totally fine in my area to have a "plastic" wedding and it will be easier for my folks to clean up. We are getting married where my great-grandparents, grandparents, parents, and sister got married, so it's super important even if I can't have the linen because of the hassle. My parents are paying for a full catered meal, and it will be "formal" but just with plastic. Oh man...I'm having one of those redneck interventions. I moved away to have a better life and lifetyle but I still love my little hometown. But anyway, any advice is great.