D.R.
hi E., if you do want to continue breastfeeding when you return, then i wouldnt really try to wean him at all. you dont need to. just be sure he will take a bottle before you go and leave it at that. i assume you will be pumping while you are away, that will decrease your supply a bit in itself. nothing you wont be able to bring back up once you get back to your schedule, but weaning and then solely pumping will be that much more of a blow to your supply, plus the fact that he is probably decreasing anyway due to his increased solids... a triple blow all at once. if anything, what i would concentrate on is making sure that he is comfortable taking a bottle, and especially for the feedings you think will be more difficult for him to substitute the bottle, i am guessing to go to sleep and overnight. and if you arent going to pump enough milk before you go, then be sure he will take the formula. if he will take it a little while you are here, then he should have no problem taking more of it while you are away. oh, and be sure he will take the bottle from whoever it is that will be watching him, sometimes they will take it from you but not someone else (and sometimes they will not want to take a bottle from someone else if you are around, but will have no problem when you are out, try it). i would sub a bottle at different times, especially those times, a bunch of times before you go. you have plenty of time and 2 days away really isnt so much. but switch it up, sub a couple of times a week at different times. you dont need to get into a regular substitution unless you are wanting to make that change overall.
i left my first son for over a week when he was 6 mos old, had surgery when he was about 11 mos, no nursing for about 4 days, left my daughter for 4 days when she was 6 mos, had another surgery when my daughter was 7 mos, no nursing for about a week, and went on to nurse all my kids for over a year and a half each. you will be fine :)