Hi amom526 - welcome to the world of 2-1!
First of all, have you seen these links:
http://babywhispererforums.com/index.php?topic=95670.0http://babywhispererforums.com/index.php?topic=41952.0The decision as to which nap to cap really rests with how your LO prefers to nap.
If your LO likes a long A time in the morning, or is resisting going down for his AM nap at the usual time, then I would start extending his A time (very gently, 15mins at a time) & let him sleep at the AM nap & cap the PM nap. As his A times extend, the AM nap should lengthen & the PM nap gets later & later in the day & you cap it shorter & shorter until it becomes a CN. Eventually the nap is after lunch & the CN can be dropped. You may find you need to cap the AM nap at 1.5-2hrs or he may refuse the PM nap.
If your LO will go down easily for his AM nap at say 9.30 every day and/or is refusing his PM nap, then I would cap the AM nap. This will make him more tired for his PM nap so he will sleep longer at this nap. As you cap the AM nap shorter it will bring the PM nap earlier until it falls just after lunch, which is where it will stay when they drop to 1 nap.
IME (I have tried both methods) short AM/long PM is the best approach because a) PM nap refusal is less likely, and b) they are less likely to be OT at BT than with the long AM/short PM approach. Having the shorter nap in the AM also means they are unable to treat the nap as an extension of night sleep & so are less likely to EW.
Was yesterday a typical EASY for you
I notice he did a much longer A time in the AM today - is he starting to resist napping at 9.30 or did you just decide to extend him? I understand your nervousness at capping the morning nap - I am just wondering though if he is only taking a long sleep b/c he is catching up from all the NW's IYSWIM?
Whichever way you decide to approach the 2-1, he will need to be able to consistently handle an A time of around 5hrs & do a 2-3hr nap before you can drop to 1 nap successfully. This can take quite some time - most LO's drop to 1 nap between 12-18 months. My LO is almost 15months, we started the transition at around 10/11 months & we are still doing some 2 nap days now.
HTH.x