Have place in Mallorca so go lots at easter – days are warm, nights cold; mornings are still, afternoons can be windy; if you’re there for a week expect rain for 1 or 2 days. Having said that we’ve had amazing weather sometimes (25-30C and uninterrupted sun).
Beaches will be quiet but the sea is cold so take wetsuits if you have them, pools are baltic unless heated and prawny’s right there are loads of roadies (esp Germans in matching kit riding 2 abreast in groups of 10). Palma is really worth a look, Easter is a great time as its quieter. If you have kids then mini golf is fab (many all-inclusive hotels have courses and you can rock up and play), as is go-karting – all of which will be cheaper as its off season. There are loads of local festivals which are worth a look and town markets are much quieter than high season. Also check out the Palma-Soller railway, but check that its open as it has been undergoing renovations.