+1 for Crib goch, + N face of Tryfan.
Come down off tryfan via bochlywd or carry on up bristly ridge to the glyders.
If you have plenty of time do the Snowdon horseshoe. Park in Llanberis and get the sherpa bus to PyP carpark. No point trying to park in the valley.
Promise me you won't go up snowdon via the Llanberis path as its incredibly boring apart from the veiw across to Cloggy!
If you want to do the Glyders go up via Llyn Idwal and devils kitchen. Come down y gribin for a nice loop or continue to bristly and come down via bochlywd again
For camping, the campsite Gwern Gof Uchaf is a good choice for Ogwen valley, wild camp at Bochlywd or for snowdon side there is a nice but basic site at Nant peris with the vaynol arms for an excellent watering hole and they do good food too!
HTH