脑洞大开之另类义工计划。。
退休了以后，买个CAMPER。有很多地方国家和州立公园可以做义工，住在里面免费，要求是有一定时间为公园工作（比如维护，讲解，等等），大概每州20小时，剩下的时间自己玩。一年去一个地方住一个月。。
https://www.nationalparks.org/connect/blog/volunteering-national-parks
http://www.parks.ca.gov/camphost/#:~:text=We%20are%20looking%20for%20friendly,be%20closed%20to%20the%20public.
https://parks.ny.gov/camping/camper-assistance-program.aspx
https://www.parks.wa.gov/275/Park-Host-Program
https://www.maine.gov/dacf/parks/get_involved/campground_host.shtml
加拿大各地公园也有类似住在公园里服务的机会:
https://www.pc.gc.ca/en/pn-np/on/pukaskwa/activ/benevolat-volunteer/~/media/9532D2A87C5C4EB58C3F526AB6B7B1BB.ashx#:~:text=Campground%20hosts%20provide%20a%20friendly,feel%20at%20home%20in%20Pukaskwa.