Kiyomizu-dera is always crowded, but even so, I still highly recommend that first-time visitors to Kyoto come here at least once. The temple’s architecture is truly distinctive, especially the Main Hall and Kiyomizu Stage, which were built into the mountainside. Actually standing there and experiencing their scale is completely different from simply looking at photos.
However, if you’re traveling with older people, I’d recommend taking their stamina into consideration. Kiyomizu-dera is located at the foot of Mt. Otowa, after all, and entering from the regular visitor entrance still involves walking uphill for a while. The temple has actually made considerable efforts to improve accessibility. Wheelchairs can enter via the emergency access road above Chawan-zaka, and there is also a step-free route near the Main Hall. Compared with other temples I’ve visited, the accessibility here is quite comprehensive. However, because of the temple’s sloping terrain and historic buildings, making it completely accessible is still difficult.
The temple grounds are also larger than you might expect, and since this is one of Kyoto’s most popular attractions, you may have to wait in line in many places. Otowa Waterfall, for example, is very popular, and each of its three streams is associated with a different wish, so you’ll usually see people lined up there. If you want to avoid the crowds as much as possible, arriving earlier or later may help, but Kiyomizu-dera is so popular that you may still encounter quite a few visitors even around 8:00 a.m. Still, the experience is usually better than during the busiest hours of the day.
As for transportation, I personally wouldn’t recommend driving. There is no parking lot on the temple grounds. Although there are Kyoto municipal parking lots and other privately operated lots nearby, spaces can be hard to find during busy periods. Even if you do manage to park, you’ll still have to walk some distance uphill, since you can’t drive directly up to the temple gate.