Mount Surprise is the first stop 30mins west of the Undara volcanic lava tube turn-off on the Gulf Development Road. Bedrock Village, on the right as you enter MS from the east, is a well organised caravan park with reasonably priced cabins. We stayed in a cabin “deluxe” which, which while not exactly luxurious, was new, clean, compact and quiet, with a nice veranda (apply mosquito repellent in the evening: we got more bites here than anywhere else we stayed), and just about adequate (but rather Spartan) cooking/eating equipment. There is a swimming pool, amusingly frustrating and free mini-golf, and, for a small fee, the opportunity to eat in the evening al fresco and socialise with the owner, who, we are told on the website, has “outback charisma”. Many people also choose to take tours to the lava tubes and gem fossicking. There is a pub, cafe (with proper coffee and local gemstones), grocery store and petrol within easy walking distance. We much preferred Mount Surprise/Bedrock Village to the Undara Lodge cartel: visit both websites (and Trip Advisor) and judge for yourself. You are not allowed to visit the lava tubes unguided (as a geologist I found the stated reasons for this ban unconvincing), but you can do the excellent short walking trail around Kilkani Crater rim: drive 40kms east, turn right on the Undara road for 6km then left on the dirt track signposted Yaramulla 7km. The volcano is not mentioned at this turnoff (I wonder why?), but you will see signs later along the road and end up at a National Park parking area with picnic tables and information for the 2.5km trail. We did this around midday – a little warm perhaps but we had the whole place to ourselves as the tours start earlier and this makes an obvious first stop as you can view the tubes from a distance.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.