We will stay in Old San Juan for one night, before heading on to Vieques. I wanted to stay at El Convento but their website says 2 night minimum. Any idea whether they would waive that as it gets closer if they have room? Alternatively, can someone else recommend a very good hotel in Old San Juan? (Smaller, interesing place would be good -- we have not use for a large chain casino hotel). Also, how long should cab from Old San Juan to Isla Grande airport take on a Sunday morning? Thanks!