I think I should be fine just parking on the center stand in the evening and checking the oil in the morning before heading out again.
Now if you guys want to see an ugly oil check procedure, here's the official Buell procedure for a hot oil level check on their 1125R and 1125CR bikes:
Oil Level Hot Check
Perform engine oil HOT CHECK as follows:
1. Ride motorcycle for approximately 10 minutes. Ride at
least 5 miles (8 kilometers) to ensure the oil is hot and
the engine is at normal operating temperature. Readings
taken with colder oil could lead to an overfull engine condition.
2. Stand the motorcycle upright (not leaning on sidestand)
on a firm level surface. An uneven surface will produce a
false oil reading.
3. Idle the motorcycle for three minutes. Shut off the motorcycle.
4. See Figure 1. Loosen the dipstick.
5. Wait for 3-4 minutes after shutdown (with vehicle still
upright) before reading the oil level, or false readings
6. Unscrew and remove dipstick from oil filler hole. Wipe
7. Insert dipstick into oil filler hole, screwing dipstick in
8. See Figure 2. Unscrew and remove dipstick and note oil
level. An indicated oil level between MIN and MAX (measured
after performing steps 1 through 7) is acceptable
for safe engine operation. Oil should be added in 3.4 fl.
oz. (0.1 L) increments, depending on how far the level is
from the MAX reading. Confirm oil level by repeating
steps 1 through 8.
If the oil level is at (or above) the OVERFULL mark, drain oil
at 6.8 fl. oz. (0.2 L) increments until the oil level is between
the MIN and MAX marks on the dipstick. Repeat steps 1
though 8 to confirm proper level.
9. Hand tighten dipstick into oil filler hole.
As written, it looks like you have a one minute window in which to make the reading. I own an 1125CR, so compared to that, the BMW R1150RT-P procedure is a joy.