I can't make the trip (rats!) but I noticed on the H2 thread the trails you are considering. Mosquito Pass is over 13,000 ft. and is most likely snowed in and impassable (you might be able to go a little way up but that's going to be it). Hagerman is also fairly high and probably snowed in quite deeply. Devil's canyon is in an Elk calving area and is gated until the middle of June.
May I suggest Slaughterhouse Gulch, Harris Park, or Bunce School Road.
Edit: I just found that my write up for Harris Park has not been poted to the trails data base. Let me know if you want direction and I'll email them to you. It's in the same general area as Slaughterhouse Gulch, near Bailey.
[This message has been edited by bill (edited 02-27-2003).]