I remember a couple being pretty tuff....the ones between cylinders 3 and 4 if I recall. I remember soaking them with punk blaster and having at it with a breaker bar and cheater bar, it was kinda scary cuz I've seen pictures of the bolts breaking.
Are you confident you aren't compromising the head gasket by not replacing it after taking out all the head bolts? Reason i ask is that I've seen discussions on that matter and most seem to believe it wouldn't be a good idea. Others have mentioned ratcheting the head down to the block on either ends corners to minimize the impact of releasing the head bolts.
Remember once you take those head bolts out you will want to do a very thorough job in cleaning out the bolt holes. Otherwise you may get false torque readings when putting them back in. The manual says to use a light (very light) coating of oil on the threads before bolting them in.
What's wrong with the rocker? rebuild time? or are you going to put one of the LCE oiling ones in there.
1990 Camry LE v6
1992 Pickup Dlx 4x4 4cyl.
2005 Nissan Frontier 4x4 Nismo v6