I have an 8x10 silnylon tarp that I planning on using on an upcoming trip as a rainshelter/dining area. I plan on tying it up and basically using it as a ceiling if there is rain so that I don't have to sit in my 1-person tent.

The question I have is how much rope would you recommend to bring? I have 50ft. of Kelty Triptease Guyline. Will that be enough? The tarp has grommets every couple feet. Should I cut the 50ft. into two 25ft. pieces? Also, any recommendations on the easiest way to tie up the tarp would be appreciated.