That's consistent with my plan. I've been walking when I get water since I started with halfs, and I've find on my long training runs that walking a bit is ok. If I don't feel I need water, I'll stop for Gatorade anyway just because I want to walk for twenty seconds.
My run should have a 4:20 pacer. I'm going to run with them. I ran with the two hour pacers a year ago, and it was great. They didn't slow down for water, but that was ok. I just caught up with them over the next half mile and then stuck with them until I needed water again.
For my plan, 4:20 is a 9:55/mile pace. I think I'll feel good with a 9:40/mile moving pace, so that gives me about five minutes to work with to stick with the pace group.
Do you carry your own water during the race? I have been on my training runs but look forward to using aid stations for the race.
Standing in a line would be devastating. But, I do feel much better after stopping. I've never needed it in a half, but the long training runs have been mixed. I just need to pay close attention to my diet 48 hours ahead. No full bags of chips, no matter how much I want the carbs and salt. I think that's what got me last week.