I'm hitting Tahoe in late March, too. I chose it over SLC, mainly for the Spring Conditions, the beauty (I'll have my lady with me), and the fun town. The costs were pretty similar. SLC is a decent town, but it still has a mormon air hanging over it, bringing down the fun level. That being said, they get some really good concerts in SLC and PC is a good time.
If the rain hits Tahoe, there is a chance that Kirkwood (40 mins south) will get the snow. I was there last year over the first week of April and it was Phenomenal!!!
Traveling the States and Taking Pictures