When I 4-table I definitely don't get the same reads as when playing just 1. This means I take whatever notes I can, know who the big stacks and small stacks are, and probably play a little tighter and more straightforward. Play the cards more and the players less(since less reads). I also play at the lowest level to clear without mixing table limits.

Unless you want to play forever, you almost have to multitable to clear the bonuses, so you either play 1 table for about 4x longer or play 4 tables and adjust your play a little.