You don't even have to leave Crieff itself to have a good...
You don't even have to leave Crieff itself to have a good walk with attractive views and you can choose whether to go uphill or walk on the level, in among trees or out in the open. Then there is the benefit of having a range of nice coffee shops or cafes and hotels to have a break and restore the calories you've used. There is plenty of choice for evening meals as well, whether at Yann's at Glen earn House or their sister restaurant on the High Street, The Lounge. Crieff Hydro offers a variety of restaurants and menus too, but it can be busy and booking is advisable. The Winter Garden there offers good coffee and cakes and simple lunches but be aware if you are looking for real peace and quiet you can't predict when a coach tour or large group might descend.
Crieff is an easy place to get around on foot though if you should have trouble walking uphill to your B&B or hotel there are buses and taxis. Car parks are also handy for the town-centre.
Sadly there are quite a few empty shop-fronts on Crieff's High Street which is danger of giving the town a slightly neglected feel, but it is well worth exploring and going in to places because the local folk are welcoming and there are treasures to find, whether it's local produce, galleries, clothes or indeed jewellery such as the lovely range to be found at the wonderfully named 'Tangled up in Blue Boutique and Studio' at 16 High Street. Jenna McDonald's work is a must-see.
Plenty to see and do also around the area - visit the various attractions on the outskirts of the town and Drummond Castle Gardens or take a drive up The Sma' Glen.