HELP! I need input on which of these loops people recommend... 1500 1600 1700 1800 1900 and WHY? We were thinking the 1800 loop near the pet walk since we will have the two puppesters with us - but it looks like that is far from the comfort station, too. We have a pop up with a slide out if this helps. We are TOTALLY fine staying in a full hook up site, too. Anywhere we can save $$$!! LOL