I'm in Chesterfield.

If you want green for the purpose of just the wedding... go with Kentucky-31 Tall Fescue. You can get it in abundance at any of the stores around here, such as Pleasants Hardware, Lowes, Home Depot, etc. Its low maintenance and hardy. It's not going to win you any awards, but it will definitely have the best chance of establishing and surviving the winter with minimal input and maintenance.

It will also be able to handle the foot traffic, etc. involved in preparing your property for the wedding, the foot traffic during the wedding, and of course the clean uproot traffic, etc. (I imagine trucks/carts with chairs, tables, tents, food, flowers, etc.).

Tilling the property as part of your preparation will help, but make sure you roundup first and give the plants enough time to die (1-2 weeks) before tilling it. If it's not dead, roundup again. I would till it, level it, etc. and then let it fallow for a few weeks, watering it frequently and lightly during this time to encourage weed growth. Then do a final round up treatment on any weeds that sprout. Once you've killed off any new weeds, then I would just broadcast my grass seed and fertilizer and roll the area to get good seed contact with the soil. It's important that you do not disturb the soil anymore, such as by raking or aeration to avoid exposing more weed seeds.

Since you would have previously tilled the soil, simply rolling the lawn should help push the seed into the soil. Cover with straw or peat and keep it moist. Once it reaches about 3 inches height, cut it down to 2.5 inches the first cut only. After that, only cut it at 3.5-4 inches. 30 days after germination, go ahead and feed it again with a fertilizer. Do one more fertilizer in early March (preferably with a crabgrass preventer mixed in) and you will be in good shape for the wedding.

K-31 might be good to put in the mix. It is one of the old fescues before they got deep into hybrids. It is considered a weed when mixed with the hybrids, but it does do the job of greening up.

why not just perennial ryegrass?

That's what I was thinking. I mix of perennial ryegrass and maybe some creeping fescue.

Ryegrass will not survive our summers. If there are hot spells in spring, it might peter out early. I have a neighbor with creeping red fescue and it goes dormant by April, not greening up until October. It's hard to kill because you have to the killing while the grass is growing, not when it's dormant. If you want something that might survive without further care next year, K31 is probably the best choice. If you don't want K31, then choose turf type tall fescue, which is the predominant grass sold around here. Do you have irrigation?

It's not summer in April :). No need for creeping fescue. PRG is super easy to establish and you will be mowing 3 weeks after you sow the seed. It will survive southern winters easily.

Here is what VA Tech has to say about suitability of perennial ryegrass:

"Perennial ryegrass is a bunch-type grass best suited for use in full sun to moderately shaded lawns at elevations above 1500 feet."

I tried to find out how long ryegrass will live around here. Here's a Lynchburg article saying it dies in early spring: ryegrasss

I have no experience myself with ryegrass. The only seed I have seen in stores is annual rye, which some people with Bermuda use to overseed in the fall so the lawn is green through the winter.

I highly advise against rye in the Greater Richmond Metro. Like Becky said, tall fescue is your best bet for the area. Kentucky-31 is the best value and is almost guaranteed to be ready the wedding.

If you want to spend a little more money, then look for Turf Type Tall Fescue. Pleasants Hardware has a good selection of tall fescue types that are better priced than Southern States.

Personally, I used a mix called "Southern Belle" at Pleasants that contained contains 3 tall fescue cultivars that are ranked high on NTEP and are on Virginia Tech's recommended list: Raptor III, Firecracker SLS, and Titanium LS. Titan RX is also fescue that is sold in the area that is recommended by VA Tech... and it's not badly priced. You only get the one type of seed, which means it's going to be a monostand. Pleasants usually restocked their seed in mid to late August.

You can also find TTTF at Lowes or Home Depot, but all of the products they carry (Scotts, Pennington, Rebels, etc.) are coated... which means you get 50% fewer seeds per bag, so it's generally more expensive to go with those. If you decide to. I recommend going with the Rebels brand.