From what I've read, it's best to go on BTMR in mid/late afternoon during hot summers, because the oil on the track is at its hottest and greasiest, making it much faster.
From a rider's point-of-view, BTMR is one of those coasters that make going to DL or WDW worth all the lines, the heat, the excessive prices, etc.
From a castmember's point of view (well, mainly an OutDoor Foods castmember), working a stand within the vicinity of BTMR is the worst, because it's:
1. The farthest from the garage (where we call for restocking our stuff), so re-stocking orders normally take the longest and we often run out of stuff in the summer (namely water, which pisses off the guests)
2. In the bottleneck area (BTMR, SM, WDW Railroad), so there will always be a lot of people no matter what.
3. The bottleneck is not part of the Utilidor, making it an extra long walk to get backstage (aside from the SM breakroom)
We've got 4 Frontierland bottleneck stands, three of which are arguably the worst in ODF to be assigned to, and one of which is always my favorite:
1. Popcorn 9: Thunder Popcorn - also called Mountain Pop, it's a Popcorn/water/soda stand right by the entrance to Big Thunder Mountain. So not only is it convenient for guests who want to buy a water on such a hot day before falling in line for BTMR, it's also convenient for guests who just get off of BTMR and is in the mood for a nice cold water. I hate this stand with a passion, mainly because one of my worst days of work (April 4, 2005) was here, and mainly because it's just a horrible place to work.
2. Ice Cream 7: Splash Ice Cream - Located right off the bridge between Frontierland and the bottleneck, close to FLEM and Thunder Popcorn. It's got ice cream/water/powerade/lemonade, and is perhaps the second busiest ice cream stand in the park (Ice Cream 1: Exposition Hall Ice Cream is the busiest). I never had to work a full shift here, only ever did relief shifts, but it's horrible nonetheless. Whenever a castmember's been bad, they get assigned here.
3. FLEM - Frozen Lemonade. Over the radio we call it "Frontier Lemonade" because no one likes to hear "FLEM" (phlegm, get it?) on the radio. It's okay to work at, but you run out quickly and people often confuse Strawberry Lemonade for Pink Lemonade and come back and complain that it tastes like Strawberries. I've opened and closed this stand several times. Closing's better, as no one really wants frozen lemonade at night.
4. Ice Cream 8: Thunder Ice Cream - strangely, this is located by the Splash Mountain Entrance, but because Splash Ice Cream used to be Splash Popcorn back in the day, this was called Thunder. Then when they decided to dump the popcorn (and move it to Popcorn 9), they called it Splash Ice Cream and didn't bother switching the two around. So remember, Thunder Ice Cream is closer to Splash Mountain, while Splash Ice Cream is closer to Big Thunder Mountain Railroad. This was one of my favorite stands, because it was nothing but ice cream, it opened later than everything else in the bottleneck, and closed first in the bottleneck. Also, its placement makes people forget that it's there (they notice Splash Ice Cream first), so it's hardly busy, but when it is busy, it's only for a little while.
Aaron: With Mary Poppins and Pete's Dragon on Blu-ray, Bedknobs & Broomsticks seems like a given. Come on, Disney! They could even call it the Naboom-Blu Edition!