Reb, I don't know anyone in-person both strong enough and willing to play such a long game during the work week. I will play a training game on Thursday against Chessmaster, "Josh, Age 12, 2100" to get a feel for the pacing.
Loomis, you are right, playing fast enough shouldn't be a big concern since I can play faster time controls. More endgames! That would be sweet. ;)
trentthechessnut, thanks for the note on pacing.
erad1288, that's true--more time could work for me, hard to tell. I plan to play a practice game so I'm not learning so much on the job.
Mostly, I'm focusing on solving difficult (1700-2000) tactical positions and getting on a good sleeping schedule so I'm well-rested for the event. I think my repertoire is solid enough but will do a quick run-through on Friday so I don't forget key lines.
my feeling is that even though you've played mostly quicker games that it really doesn't say much about the time controls you would be most comfortable with. As such, I would definitely back Reb's advice of not falling too far behind on the clock, but the way I would go about it is to write your time down after your move for each move and then see how much time you used and where the major parts of it were used. It may take 1 or 2 rounds to really get a feel for the new time control, but in this way, you will quickly see how your style should be fit to game length. For example, the first round you go in and face a positional opening, say the caro-kann, right then and there you must recognize that the game will go a bit longer so you try to speed up a little more as to not risk severe time trouble. On the other hand, you will probably get to know some of your competitors as well, and just by glancing at their clocks and the scoresheet, you should have an idea of how fast/slow they tend to play. Make use of it, and you will come to definite conclusions as to how fast to play given the when (position-wise) and where (time necessary relative to the opponent).