I wouldn't automatically get one, but in my labor with DS, I felt it helped me later on. I initially refused (had ketones in my urine) and thought about it for a little while (around 8cm) and felt that I would go ahead and do it for energy. I felt it gave me more strength after.
Is it very common for homebirth midwives to have an IV available?
I was eating honey from a spoon, had vomited twice that day. Had some gatorade, some water.