There are 3 teams based in the Isle of Wight in the Wessex League - Cowes Sports, East Cowes Vics and Newport and yes we get appointed to them. We take the boat over, it's about 25 minutes on the Redjet and then have to make our way to the ground from there, sometimes we'll get an AR based over there who will pick you up, other times the club will.
Midweek games kick off times involving the island sides can have different kick off times to accommodate the boat timetables and when there is bad weather involving games with island teams a consideration is whether the weather is going to be bad enough that the crossings are suspended.
If I get a Saturday game on the island, I normally get the boat across from close to where I live into Southampton, then hop on the Redjet across to the Island. With boat timetables, it typically means leaving home at about 11.20 and getting back about 7.15 for a 3pm kick off.
We normally only get 1 or 2 on the island games per season, but if you get sent there regularly, you've probably upset someone!
Jersey play in the Combined Counties which is the next league north of ours geographically, so don't have any experience of them.