Welcome to the forum.
We use 3 filters in a series: First a Camco 40043, then a Pentek CBC-10 Carbon Block Filter Cartridge, 0.5 Micron, and finally a Pentek 155319-03 Ws-10 10" Water Softening Cartridge(not really a 'filter'). We only use water from our FW tank that has passed through these 3 filters (or our FW tanks were filled from our house softwater).
Most filters, like the Camco, remove sand etc. The Carbon Block Filter is the one that removes chlorine and bad tastes. If you are going to drink the water from campgrounds, investigate using better water filtration.
We never connect to the 'city' water connection. We use water from our FW tanks for EVERYTHING; drinking, bathing, etc. The flow rate for the 2 Penteck filters is really too low for comfortable showers when using the 'city' connection.
We traveled about 8,000 miles last year and our water tasted consistently fine. The softener filter made washing and showering feel almost like home.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.