Senior pass is accepted at most NP's in the country. IT's use is for camping, but usually does not include any 'vendor operated' features.
And most NP's allow for tents, backpacking, RV's, Vans, pretty much anything provided you can fit on the site. Occasionally, a NP will have W/E, but most are 'site only' ... most have restrooms, very few have showers, and the more primitave NP and NF have pits.
NOTE: IN some areas, vendors are either running or attempting to engage the NP service to allow a vendor to run the camping facility, instead of rangers. When that happens, the vendor attempts to 'disallow' the discounts. Over the years, we've been communicating to our congress that this senior discount is earned, and it should continue to allow senior and disabled to camp for half-price, instead of fulling the vendor pockets with the extra. THe vendor knows aboutthe discount when he signs the contract, them begins immediately to find a way around it. Watch out for this action, and write your congressional representives whenever you see it.
