Welcome to the forum and Heartland family. Congrats on your new upcoming rig. Save yourself a lot of aggravation and take your time really going over the rig when you pick it up. They should have it hooked to shore power and water as well. Have them go over every thing with you and look for issues such as leaks under sing, loose connections, faulty switches, etc. Better to catch it now than to find it later. By doing la good inspection now and eliminating the issues, you don't have to be like some who post back complaining of their rig's issues they should have caught at the dealer.
Enjoy your new rig and hope to meet you down the road.