I don't care for wubi even though I read many people who love it.
One issue is where the space is. If at end then no you may need to create a bit more at the beginning to use for at least /boot.
DavidMcCann and TobiSGD are correct in that if you have a newish supported system and enough resources a VM is a great way to go.
An 8G usb is enough to install Fedora too if you want. You don't even need to use unetbootin or universal usb installer. A 16G is almost cheap now and you could run linux for a year or so on it I'd guess without ever running out of space. Some usb installs are funky once in a while too. The most safe way they work is the www.pendrivelinux.com