There's plenty of space for a 60ft boat to anchor
around here. There's rarely more than about 10-15 other visiting boats anchored in the bay, which is large and deep unless you approach too close to the shore. I have seen boats bigger than 60ft anchored here.
You would, however, have to do various runs to the local petrol station to get your diesel
. Any local taxi driver (many have pick-ups) would happily do this for you - it's a 3 minute drive from the dock/pier to the petrol station, you would then have to ferry
the diesel from the dock
to your boat. I've seen plenty of visiting boaters do this. Fairly tedious, but then you get to visit paradise.....
Most places don't accept credit cards in Providencia. Most foreign credit and debit cards work fine in the two bank ATMs on the island. Travellers cheques can't be changed anywhere, but if you bring dollars you'll find people (normally the supermarket owners) who are happy to change to pesos for you.
Hope that's of help....