Just keep cutting blocks. You are going to get your feet wet but you'll dry. Looks pretty simple from here.
yeah, that is good advice. hay farm manager?? you got plenty of 'rural' type experience... so call on it, and use it to guide you... if it was mine, and I had the gap to the water... to deal with etc... I would cut it into chunks... 1/4 down for each cut... use other woods to support it or wedges... take wedges out, be careful... its heavy and will 'splash' big as hits water... be sure no brookies in there... lol... of course... could let it sit there in the interest of time and safety... see if the water can move it next rains... work on the one on gound first...
bottom line is whatever... just don't get hurt... it is a precariously set trunk... not an easy bucking job... Think Safety At All Times....
keep us posted...