surge protector and water filters

I suggest a Progressive Industries EMS for electrical protection. Initially I had a portable one, then went with a hard wired unit . Keeps it out of the weather and away from prying eyes. With an EMS you get surge protection and protection against open ground, mis-wired pedestals and very importantly under voltage. Many times ours has detected under voltage while at older CG's during hot weather when people were running AC's. Low voltage will quickly ruin your AC unit(s). I later added a Hughes autoformer to boost the low voltage, but initially you should at least get an EMS.
Regarding water filters, I use a Camco on the hose at hose bib end. We have a whole house filter inside the rig... I also have a water softener... the later is a recent add in the past couple years.
Good luckwith teh new rig--- enjoy !