James--Have you been to jpouch.org? I know there will be a someone along soon who's been in your shoes, but that site might be able to answer your questions, too. I don't have any first hand knowledge of j-pouches, sorry
Were you on steroids before your first surgery? Sometimes the drugs we have to take before surgery can delay healing...will you be talking to your doc soon to get his take?
If I am to understand correctly, your stage 1 was to remove your colon and create a temporary ostomy. Stage 2 would be to create the j-pouch (then let it heal) and stage 3 would be to reconnect. You may have the choice to have the j-pouch created and reconnected at the same time?
This is definitely a decision to make with your surgeon however, my opinion is to keep to a 3-step. I think there is less chance for problems (leaks, etc) if the j-pouch is allowed to heal without having to begin working immediately. I know that often step 1 and step 2 are combined (that was my daughter's case). I haven't heard too often combining steps 2 and 3.
My daughter had her colon removed and the j-pouch created in July 2008. She had the ostomy removed and the j-pouch connected in November. She had a very quick recovery for the second surgery. She was back at school (and her activities) within 3 weeks. She had a little less than 2 weeks after surgery that her body had to adjust to its new "plumbing". She is not chained to a bathroom, does not have to search out a bathroom immediately upon entering a building, and can hold her "need" for quite awhile.
I would think that your recovery time for your 3rd surgery will be much shorter than the other two. Barring any complications, your summer should be great.