SO many great places to visit... Death Valley in the winter is grand, the sand dunes are "surfable" and hot spring for soaking are less populated.
Joshua Tree is nice for a day or two,
Pismo beach one can drive ON the beach
the coastal highway is nice and there are about 60% less other vehicles to contend with.
Moab is great, April will still have snow on the la Sal mountains in the distance, perhaps some ice on standing water outside but usually not freezing water in an RV cold, nice April WX.
All along I-15 and I-70 are great parks: Arches, Zion., Bryce, Canyonlands.. and others less traveled... NOT to be done with a trailer but the Burr trail to the ferry crossing bullfrog basin was certainly a fun.
Winding back south one could venture to Escalante cliffs and N. grand canyon.
Almost all these places have a few Hot spring or nice watering holes nearby...
A little jealous, have a blast wherever you end up.
-Repo
05 Tundra 4x4
1977' Road Ranger, Diddums is in action.