Unless March has been very cold and snowy, the West Rim Trail should be fine. You might run into some snow, but not enough to be a significant impediment, and a Jack said, water should be easy.
Coyote Gulch is an excellent hike. Crowded by canyon country standards, but justly so. Long, rough drive out there, Hole-in-the-rock road will be very washboarded by then.
A hike out to Neon Canyon, starting and ending at the Egypt TH, is also very fun. Go out via 25 Mile Wash, return via Fence canyon.
April would be a great time to do a stretch of the Below the rim trail in Bryce. The southernmost stretches are very nice and the driving distances make it easier to do a loop.
The possibilities are endless.