I had them crawling up my fresh water hose last week on the Cape. They were the tiny 'Sugar Ants'. I sprayed a foot of the hose down with ant killer and put several traps inside on the kitchen and bathroom floor. No more ants. Next time I'll use Vasoline on a 1" section of hose.
2010 Cedar Creek 5th Wheel 34SATS "The Beast"
2006 Ford F350 Lariat 6.0L Diesel
2003 Harley Heritage Softail "Hogzilla"
1988 Harley Softail Custom "The Fireman"
1986 Marriage to "Wifey" (patience of a saint)