Lots of good options for you when the pond is down.
Bass generally like "fluffy cover" rather than weeds - but they will certainly take any cover they can get to ambush their meals.
Here is one of the good PB threads on cover.
Pond Boss Thread - CoverYou can add anything from hardwood tree branches to PVC "trees" and everything in between to benefit your bass. When the PB experts have reviewed people's ponds on the forum, the consensus is almost always that the pond could use more cover!
You can also add some terrestrial plants now, that will benefit the bottom of your food chain. When your water level got very low, I expect the bass and BG ate much of the forage species in the pond, and the tiny organisms in the pond the feed fish fry might have also been severely reduced.
You could actually plant some wheat or annual rye that would grow quickly. If you get some rains, then those plants will provide excellent cover for all of your forage species. Re-flooding will kill any terrestrial plants, but the plant structures should mostly last into the fall. Lots of other options too. What seeds do you guys normally handle on your property?
You may also be asking about water plants. Now would be a good time to start those since you can easily walk to the current water's edge and plant things by the temporary shoreline that will then by X feet deep when your pond goes back to normal pool. There are lots of good threads you can search for that information.
Good luck on your pond rehab project!