Very seriously considering purchasing a 500 for the wife and I and have a question on securing it in the pickup bed. Have a 2006 Silverado HD with 8 foot bed. Only tie down points I have are on the side (4 front and rear each side) but it appears that the wheels will block them. It also appears that I will have to leave the tailgate down due to the 102.5 inch length. Would like to know where the best tie down points on the 500 are and where you attach them to the pickup bed.