Benbecular is worth a trip - NDB/VOR on site..
Sumburgh is well worth visiting - visual approach to 33 is highly recomended!! About 40 mins by car to Lerwick if you want to stay overnight or the Sumburgh Hotel (wouldn't recommend it though!) Can be a bit windy this time of year!!!!
Islay is also worth a visit in good weather, NDB/DME on site - great if you like whiskey!!!! Very poncy distilleries on the island.