Question??

I have learned that by marking the parking spot by the two drivers side tires with a straight edge,(north/south) before I start the un-loading process that, all I have to do when it's time to load again,is to run a string over these two reference points,(I use masons line)and back-up parallel to the string. I go beyond the length of TC & Truck and wrap the string to either two bricks or two wood blocks, now just follow your string in the mirror, I generally give myself an extra inch for adjustment.If you're worried about losing your marks over time,use some reference points and take some measurements. I do this at camp if I unload also, I don't even need the DW's help with this method, which makes for a better start to our trips, lol. K Mac