haha re birthplan, never had one either, but we had prenatal classes with DS1 and when the health visitor showed us the forceps I thought, yep, I bet I will need these - and we did, so I was actually grateful I'd been explained what they were for !
actually with my DD (6th) I wrote " I want an epidural" on every single page on my maternity records, with capital letters...when on labour ward the midwife looked at my notes then looked at me and grinned saying " so what are your thoughts on having an epidural?"

with the drip you can move around a bit, walking or sitting on birthing ball for example, but if they are monitoring baby - which is likely - your movements might be more restricted.
can you call the hospital if they can reserve one for you. I never used one, so no idea if it is any good, some say it's useless, some love it... but they tend to be people with natural labours, not induced!
If you end up with hormone drips I really vote for an epidural...those contractions are bastards - feeling better? 
I know you don't feel ready, but see it from the positive side, you might be a mum tomorrow! how exciting!
all of mine (apart from C-section) were late, DS2 topping the charts at 14 days overdue, so I'm not going to feel sorry for you! 