The linden camping are in some sims, Which are not listed and hard to find,would need to be in the group too , There is other ways to earn if you do not like working jobs in sl. One of the top ways is Fishing now. It is called the Fish Hunt, You can find a Fishing Rod in the market place for Free. Another way is to the Gold Hunt , You would aquire a hud for this as well in the market place. I did it once . Lindens are slow ,but you can earn lindens.
https://marketplace.secondlife.com/p/Linden-Gold-Hunter-HUD-Earn-Linden-by-hunting-for-coins/2265556
https://marketplace.secondlife.com/products/search?utf8=%E2%9C%93&search%5Bcategory_id%5D=&search%5Bmaturity_level%5D=GM&search%5Bkeywords%5D=Fishing+Rod
http://www.goldtokens.net/ ( Page about the Fishing and Hunt) There are some who loves to fish and bought the pricey rods they have. This page will help you get started )
I suggest a premium account. They are runnning a special too i saw today.!
http://secondlife.com/premium/
50% off first quarter! Drools* For Premium ,you can have a house and 300 linden stripends is paid to you weekly,plus after 45 days you recieve 1k bonus for staying premium, premium sandbox and gifts*