We belong to the BPOE (Elks) and we've stayed at dozens of Elk Lodges across the country. Some are very nice RV spots that have been created specifically for RVing, and some are upgrades to existing elk properties near the lodge. Sometimes the campground is separate from the lodge. An example is Tilamook Oregon Elks. They have a wonderful campground just south of Tilamook Oregon.
Many times we will just stop for one night while traveling. Then we stop by the lodge for a meal and a beer, and we leave in the morning. There are many Elk lodges close to major highways.
The Elks have realized the RVing is a viable way to bring in income. We pay from $10 to $25 a night, it depends on the facilities. Dinners at the Elks is usually very reasonably priced and the quality is pretty good.
I've read on here where some lodges have a special RV week, where potential members can send in paperwork ahead of time, and then they have an expedited membership process that takes just a few days to complete. I don't know which lodges do that, but the info. was on this forum. Those lodges will sign up several new members at a time.
I would encourage you to check into this as it does offer many possibilities for RVers.