Set and Leave pressures for dispensing

Ok I am bringing 3 kegs to a party today. All the beers are carbonated already and still at about 34dF. Unfortunately, my Co2 manifold is only set up for 2 kegs. So I am thinking I should be able to set everything, put a said amount of pressure on each keg and still have no problem dispensing through my picnic taps?
Does this sound right. I was thinking about 6lbs should do it. As my lines are 4ft and the foaming is pretty bad.

just move your gas QD to whatever keg needs more pressure when it gets used. Or get a 2way manifold for one of your regulators so you can keep pressure on all 3.

thats what I was thinking originally, All the kegs have different volumes so the dispensing pressures will need to change per keg.

I just need to splurge and get a cheap 4-way manifold

I put 2-way splitters on each of my 3 regulators...