First, congrats on your impending nuptial!
You should do the math (serving temperature vs your carb volume to determine the beer line length to your picnic taps. I often see way too short lines being used and the result can be aggravating. I'd be sure to have at least 6 feet of 3/16 vinyl on each tap, and 10 feet isn't unreasonable at all.
As well, if the kegs warm from the temperature that you carbed the brews, CO2 will want to come out of solution, resulting in persistent foamy pours. Some LHBS rent jockey boxes which can be very helpful in maintaining beer temp at the faucet, avoiding the need to flatten the beer in advance.
As for the potential for cloudy pours, you can reduce that to some degree by either doing a gelatin treatment or an extended crash-cool, then drawing a couple of pints off the kegs. Neither will be absolute because the shape of the keg bottom will typically hold some of what drops out beyond the reach of the dip tube...
Cheers! And best wishes to you and your spousal unit