Go do the Dark Hollow trail near Big Meadows that runs along a stream or do the Old Rag.
I was up there last Sat. and did the Dark Hollow trail, not much bugs. once you
get down the first section onto the gravel horse trail go over the stream on the horse
train to the right and keep following the stream. It's ice cold water to fill up on.
Great Falls on the Potomac is very nice too. The Billy Goat trail is a good one with spectacular views of cliff rocks along the Potomac. It's a moderate hike but fun.
Beautiful time of year here.
No big worries on ticks with these trails.
If you can do a week day trip you will have a lot less people to pass up.
Cheers,
Craig