Dean, welcome to the board...the best bet is to use the FREE Generic Benroy plans listed at the top of this page...they are free ya know and developed with the input of many here on this board...modify the profile as you like and you will have what ya want for free...free is good
madjack
p.s....if ya just gotta buy something, consider Steve Frederick's build CD...it is not a step by step plan detail as such but rather covers the techniques he uses to build some mighty fine campers...they can be adapted to any profile