4 tie-outs may be a little bit of overkill for me, but I would like to see pics of that setup if you try it out.
I like my hammocks to be wide as possible. It makes them more comfortable. I have a hammock that is kinda narrow and if I use it with my Big Agnes Air Core pad it kinda gives me the feeling that I may fall out because I am sitting up higher in the hammock. I don't think I would fall out, it just has that feeling.