Dont see it as an issue, you would want to go up with a safety or instructor for an hour or so before you set off to make sure you havent forgotten anything but otherwise do it - don't just jump in and set off if you are not confident of your proficency!
I can rack up 5-6 hours in a day dependant upon where I fly to so 20 in 2 wks should be easily doable.
J.