I am starting on a new project to build a bed. So far my shop is mostly hand tools except for a 14" band saw and a floor standing drill press. This specific project calls for some stock that is 4" thick 7" wide and about 5 feet long. I work almost exclusively with reclaimed wood and will have to glue some stock together to get 4" of thickness. I have seen this done before but it was done using a bench planer. I have had consistent luck with joining the edges of boards with my hand planes to make some nice seamless panels but this involving surfaces wider than even my pre-war stanley no. 7 makes me nervous that I wont be able to get that joining surface perfect. Is there a method of doing this with a hand plane and still getting a seamless join, or am I going to have to invest in a planer for this to work?