I too am staying in cv fields & it's my first Glastonbury, I have heard there are queues when you go into the festival each day?
& do you also get a wristband or do we have to keep the paper ticket the whole time?
The fields are outside the fence so yes expect queues in and out as you will need to pass through security. These vary but there can be a long wait to enter on Wednesday and to exit after a headline on the Pyramid or Other Stage.
You will get a wristband fitted on your 1st entry. This will be checked each time you exit and re-enter. To exit you need to show your paper ticket and you will also be issued with a Pass Out, keep this and your ticket safe as you will need these to re-enter.