Considering that you're on charter paying a hefty fee to relaxe you would think they would have designed the Bimini mounts in a way where it wouldn't interfere.
You're better off on a larger boat which is more comfortable at sea with the bonus of large water tanks which should easily hold you over for the week. <img src="http://www.traveltalkonline.com/forums/images/graemlins/toast.gif" alt="" />