Welcome aboard! there are a lot of great folks here on the forum to help you with anything ,as far as the mattress just do like most people here and get a good memory foam topper it makes a WORLD of difference ,I am a fulltimer and LOVE my Costco King Memory foam,just remember RV Kings are about 3-4 less wide than residenial kings so just cut it to size with a electric carving knife EASY PEEZEE