My previous reply was possibly misleading. The construction on 192 starts just after rounding the bend east of 535 and continues to the southeast, including the area in front of Club Sevilla. The route I gave you will not avoid the construction area, which you are stuck with, but offers a quicker alternative to following 192 all the way to maingate.
Here is a link to the best online map of the WDW area that I've found.
WDW Map
Unfortunately, Club Sevilla is off the map to the lower right.
Although not online, I highly recommend Microsoft Streets & Trips. It is a very complete mapping and routing program that include restaurants, hotels, museums, etc. even Club Sevilla is on it. It is especially handy when loaded on a laptop that travels with you. It can often be had for about $20 after rebate or at Sam's Club for $23. Well worth it.
I have never been a fan of going back to the room for an afternoon break because of the time involved. You should allow about an hour, including walking to park exit, tram to car, (and monorail to TTC for MK), driving back and getting to the room.
For offsite must do's: take a day at the beach. Playalinda Beach at the Canaveral National Seashore is very nice, about an hour and 15 min drive.