Well, I doubt I'll make you feel any better...believe me, I thought I would go insane during potty training.
Your daughter sounds like she is doing an amazing job at potty training! When I started teaching my daughter, I took her every 5 minutes. Believe it or not, she went most times, as well as in between times on occasion.
You can limit some of her drink intake, however, for my daughter it only caused what seemed like the starts of an infection as well as constipation. Until she got better at going willingly on her own, it remained every 5 minutes. She sounds she may be ready for you to encourage her to wait longer, however, there are more chances of accidents, of course. I started by asking Jordan if she really had to go bad, when she said yes, we rushed her as quickly as we could...if she didn't seem to be too desperate, sometimes I would encourage her to hold it a second. Like I said before, there were more accidents (which she did not get in trouble for...I just told her if she really had to go, she needed to tell me and we went on). To make her try to hold it sounds cruel, but we have had times, we had no choice, so it has helped her.
My family lives 12 hours away, and we make at least 2 trips a year, and were making 2 hour trips at least once a month to my inlaws, so it has helped her to avoid embarrasing accidents.
She now goes to the potty regularly and we haven't had an accident in a long time, that she physically could have avoided, anyway. We aren't night time trained yet, but we are trying, however, she gets up in the night when she realizes she has to go, and wakes up instantly when she gets wet.
As far as the meal thing goes, we still have the occasional meal potty break, but I tried to encourage her to go right before the meal, and they have lessened in frequency.
By the way, my daughter is now 3 1/2 and she is doing much better and still drinking constantly through out the day. My guess is that she is still trying to learn the "routine" as well as needing to go often.
My daughter still rushes to the bathroom 2-3 times in a 30 minute period, however, it is a huge relief from the 5-7 minute intervals we were having. I did give my daughter more plain water or extremely diluted koolaid (3/4 cup sugar and 1 pkt koolaid per gallon) till she got older. I don't know if it made any difference, but she seems to "need" to go more now that I have started giving her 3/4 cup and 1 pkt per half gallon. (Which is still less sugar than the packaged directions call for.)
I know it feels like an eternity, but she sounds like she has taken really well to potty training, so just try to keep encouraging her and keep in mind - it won't last forever, and there will be a time she'll start going on her own (while you are at home.) Good Luck! I hope this helped at least a little.