I'm joining John and Susan Pogue this coming Sunday, April 14th, on my Peachy Keene 200k route which starts in southwest Arlington. I don't know yet who else will be riding with us. Daniel and I were remarking the other day how few recumbents we see on randonneuring rides these days. Here's your chance to ride an easy 200k. If a feeble, lung-challenged old f*rt like me can do the ride, anyone can. RUSA membership is required, and you need to stop by the LSR google group to let John and Susan know you're coming.

Randonneuring is a form of unsupported long distance riding. You can find a lot more about the rules at the RUSA website, but basically, you must follow a specific route and are given cue sheets which tell you every turn to make on the route. Randonneuring is non-competitive, but you must complete the route within designated time limits. You stop at designated controls, which are usually convenience stores, and get your brevet card initialed to verify your completion of each leg of the route. If you like collecting hardware, there are awards given for lots of different accomplishments in randonneuring.
 
Yes, if you are riding 100+ miles a week, you should have no problem completing the distance. As for nutrition, everyone is different, but for many, becomes very important on long distance rides. Solid food takes enough hours to digest that it won't help much on a ride, nutrition-wise, but many of us need a little solid food to keep our stomachs settled. Maltodextrin based endurance drinks are a very good form of carbs for fuel. On the other hand, if you're one of those people who are able to fuel completely with fat, then water and electrolytes may be the only thing you need.  
 
My recommendation is to drink plenty of water and endurance mix, add electrolytes if your endurance drink doesn't have them, and eat just a little solid food. But, you'll just have to experiment to find out what works best for you, and how hard an effort you put out will definitely make a difference on what nutrition you need and can keep down.

Thanks for the info folks, I have been reading the RUSA site and the LSR group page as well.  Looks interesting, i may just give a 200k a shot and see what happens.