My son did not visit Muhlenberg but he did visit Trinity (and several other NESCAC schools).
Notes:
Beautiful campus surrounded by difficult living conditions for mainly Puerto Rican citizens stretching downtown to the Capitol in Hartford, CT. The college is very involved in the surrounding community and this is stressed as an important ongoing policy/initiative.
Common application, supplemental essay, and three letters of recommendation required. They stress demonstrated school interest during the application process.
Didn't get much exposure to sports facilities but could see from a distance. Nice looking turf baseball field. He tried to contact the coaches prior to the visit but they were not able arrange for a meeting, as in I don't think he got a response at all despite having been in communication with them at an earlier date. This is not a knock as it was during the summer and their schedules were probably pretty tough during that time. The HC did get back to him two days after his visit and invited him to a camp to "get in front of the rest of the coaching staff" but that second trip never materialized for us being 1300 miles away 
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Best of luck!