On our trips to Hilo we've always spent two nights or more, although we've stayed in Volcano rather than Hilo--I have heard that the resorts in Hilo are not anything special, although I don't have any personal experiences to back that up...if you are going up to the volcano, we would recommend you consider spending a night or two at Volcano TeaPot Cottage--it is adorably decorated, quiet, clean, high quality products throughout, peaceful, private, the ultimate "down time" and is the only cottage on the property, so you have the whole place to yourselves. We have stayed there two times, and even loved it more the second time! Their website is helpful, and the owners will really go the extra mile to be gracious to you. It's about a 1/2 hour into Hilo, and we just drove in and spent the day, then went back out to our peaceful little home away from home each night. If it is sunny in Hilo--that's a rather big IF--then the drive up the east side of the island is lovely, but remember Hilo can really rain on down, so hopefully wherever you stay has a little fireplace/heaters--it takes the cool and sometimes clammy feel from the evening air. (The TeaPot Cottage has a gas fireplace! And a clawfoot bathtub! And an outside hot tub with it's own little buidling!) Enjoy your trip--we spent last March Spring break there, and then went back for Christmas--both trips were wonderful (although in March it did rain 10" one day in Hilo--some streets were flooded, but Volcano didn't have any problems with flooding). We love the Big Island! Hope you do too--enjoy the "down time"--the Big Island has lots of it.