to the forum and to Keystone. Here's hoping you make many great memories with your new RV.
As for getting chlorine bleach into the fresh water tank. Most of us have a short piece of hose and a funnel. We fill the tank partially, then pour the bleach in and continue filling. You don't want to leave the bleach sitting in the fill hose as it will make the plastic hose brittle over time. Always follow the bleach with more water to rinse the hose and protect it from the strong "full strength bleach"