So the BBQ weather is apon us and I want to have a few bbqs!

I was wondering as you cant eat shop dips and sallads I could make my own.

So If I was to make a taziki dip and a corn relish dip (can I have phyli cheese??) and kept them in my fridge is that OK?

Same goes with a potato sallad (small spuds, herbs, mayo and bacon) that I have cooked can I then keep it in the fridge and eat it for a few days?

I guess Im wondering if I make it and store it will it still be suseptable to the nasties that are in the store bough versions??

TIA
Kate