Went through 2 camco small filters last season; traveling cross-country, never know about the water and was surprised when flow was suddenly halved one evening's stop.
Pulled filter--pert'near stopped with various heavy sludges.
Had another in storage, put it in, and later bought a dual filter "whole house" with mountings that uses the big filters and stands on its own outside the rig (oh, don't get me started on the little filter in the fifth-which we've since pulled and bypassed
We bought the new outside dual system on a deal from one of the vendors at Goshen last fall. It's working great.
As for the filtering, OC, I just figure I don't want all that "goo" somewhere in the internal-or faucet-plumbing that I have to deal with later!