I've never been on Gonal-F but I was on Menopur for both IUI cycles and into my IVF cycles as well. It varies between each person but my average length of time before taking the Ovidrel is around 11 days....although my 2nd IUI was almost cancelled so that wound up being 13 days but I think that was pretty unusual in terms of normal stim time. The IUI is kind of like a pap so its nothing to worry about too much. Its over really quick and then they have you lay there for 15-20min so maybe you can take a little nap :)
As for the Crinone, I've never been on that one before only Endometrin and Prometrium and will be on the injections this month. However, and maybe someone else can say if Crinone does the same thing, but I found it to be helpful to wear a panty liner or something since the suppositories got a little gross, blech :(
Good luck :)