Hi G, I also live in Reston. You don't happen to work for Cooley, do you?
I store my trailer at the Bull Run Regional Park. It is just 20-25 minutes away. The cost is about $48/month. Lots of space and convenient to fresh water and a dumping station. BEST place ever!
I'd love to show you my Escape. I know I'm a bit biased but the Escape is heads/tails above the Scamp or Aliner. Right now my trailer is up in a campground in Luray, VA. I'm going to bring her back down toward the end of October...if you want to wait until then ... otherwise, I'll let you know what weekend I'm up in Luray and you can visit then if you like.