We've been using overnightrvparking.com for about 7 years and we've only had to pay for 2 years. That's because every time you stay at one of the places you can go to the site and click a couple things to confirm that location still allows overnight parking or if it no longer allows parking. Then in a few days you get an email from the site telling you that you get 1 or 2 weeks added to your subscription. Every confirmation gets you 1 or 2 weeks. Two weeks are for a change in status or for confirmations on sites that have not been confirmed for a long time. We use it every night for a couple weeks at a time when we are going cross country. Usually Walmarts because of the shopping available. We use other sites too that are free but this one is much more useful for us because it has great descriptions and the date it was last confirmed.
Ginny & Eric - Full Time 4/14/12 - Our Blog "Walk About With Wheels"
2004 Winnebago Vectra 40AD - 350 Cummins ISC; Toad 2012 Wrangler 6 speed
SKP, WIT, FMCA, FCOC, GoodSam, Cummins Power Club