I'll also carry 25' water hose with a shut off at the end
to fill the fresh water tank. 95% of the time we do state parks so we don't have full service, but I do carry a extra hose just in case. If you do get a site with full service you may want a water regulator
to limit the water pressure entering the RV. A buddy of mine suggested I have one of these handy (Water thief
). I have used it twice in the last 9 years. A "Water Thief
" It hooks up to a water source that doesn't have a threaded connection or the threads are messed up.
Everything here is a $4 or $5 item. Most can be picked up at a RV store, Wally-World or online as my links picture.
I'll also carry a section of coax cable in case we happen to at a place that has cable TV included in their rate.
Your extra 25' 30 amp power cord is going to be your biggest expanse. ($45-$50)